In metallurgy there is also something to interest photographers. Messrs.

Johnson and Sons exhibit some very fine samples of nitrate of silver, double and treble crystallized, silver dippers, chloride of gold, nitrate of uranium, and other scarce metals.

Messrs. Johnson, Matthey, and Co. also exhibit some fine samples of nitrate of silver and chloride of gold; and some wonderful specimens of magnesium, in various forms, in wire and ribbon. One coil of ribbon is 4,800 feet long, and weighs 40 ounces; and there is an obelisk of magnesium about 20 inches high, and weighing 162 ounces.

There are many other things in this case of great value which have a photographic bearing--amongst these a platinum boiler, valued at 1,500, for the concentration and rectification of sulphuric acid; a platinum alembic, value 350, for the separation and refining of gold and silver; also an ingot of platinum, weighing 3,200 ounces, and valued at 3,840.

The exhibitors say that "such a ma.s.s of fused platinum is never likely to be again produced." The whole of the contents of Messrs. Johnson, Matthey, and Co.'s case of precious metals, most of which have a direct or indirect application to photography, are estimated at the enormous value of 16,000!

Mining, too, has its attractions for us; and as we near the Nova Scotia division of the Exhibition building the needle of our observation dips towards a bar of pure gold, weighing 48 pounds, and valued at 2,200 sterling.

By the gentlemanly courtesy of the Rev. Dr. Honeyman, Honorary Secretary and Commissioner in Dublin, from the province of Nova Scotia, we were favoured with a "lift" of this valuable lump of gold, and we could not help exclaiming, "What a lot of chloride this would make!" But we had to "drop it" very quickly, for the muscles of our fingers could not bear the strain of holding it more than a few seconds. This bar of gold was obtained from very rich quartz, specimens of which are to be seen near it; and Dr. Honeyman informed us that the average daily remuneration from such quartz was thirty shillings sterling per man.

It is not generally known that the province of Nova Scotia is so rich in gold; but, from statistics by the Chief Commissioner of Mines for the province, we find that the average yield of the Nova Scotia quartz is over 19 dwt. per ton, and richer than the quartz of Australia; and the deeper the shafts are sunk the richer the quartz becomes. In 1864 the total yield from all the gold districts of Nova Scotia was 20,022 ounces, 18 dwts., 13 grs. Gold dust and scales have also been found in the sands on the sea coast of the province, and in the sands of Sable Island, which is eighty miles distant, in the Atlantic Ocean. Having in our own colonies such an abundance of one of the precious metals so extensively used in the practice of our art, photographers need not be under any apprehension of having their supplies cut off.

Continuing our general survey, we stumble upon many things of considerable interest. But, as our s.p.a.ce will only allow us to particularize those articles which have a photographic attraction, direct or indirect, we must as far as possible imagine ourselves something like animated photometers for the time being, registering the aspects, changes, and remarkable phenomena connected with our art, and whatever can be applied to photography and the use of photographers; or whatever photography can be applied to, artistically or commercially considered.

Of some things non-photographic, but of interest to photographers as well as others, we may be induced to say a little; but of most subjects foreign to our profession we shall simply say to our readers, "We have seen such wondrous things, go ye and do likewise."

We finished our last paper with a few comments on what was photographically interesting in the province of Nova Scotia. Pa.s.sing from that to the provinces of the Lower and Upper Canadas, which are very properly placed next door to each other, we are struck with some very good and interesting photographs of Canadian scenery, both plain and in colours, and a frame of portraits of the delegates of the British North American Confederation. Samples of all kinds of native and Indian manufactures, and specimens of mineral ores, chiefly iron and copper, are also displayed here.

Pursuing our way southwards from the Colonial division of the galleries, we come to China and j.a.pan. The geographical and relative positions of the countries exhibiting are not strictly adhered to in the plan of the Exhibition, so we must, of necessity, make some "long legs," and experience some imaginary transitions of temperature during our journey of observation. In j.a.pan we stop to look at a life-size group of female figures, representing a princess at her toilette, attended by four female slaves, books ill.u.s.trated with wood-cuts, plain and coloured, bronzes, and many other articles of art and manufacture, by the j.a.panese, of much interest.

In China, there is a State bedstead of great beauty, books of paintings upon rice-paper, and many beautiful bronzes, carvings, and other specimens of Chinese art.

We pa.s.s through Turkey, and next come to Siam, but the latter country does not exhibit much, except of a "seedy" character. We admit we are sometimes addicted to making puns, but the Siamese send puns for exhibition. There is an article called "pun," which is "prepared lime, coloured pink with turmeric," but to what use it is applied we have not been enlightened.

Pa.s.sing through France, Austria, Prussia, Belgium, and Holland, without stopping to notice anything particularly, and turning into the south corridor, we enter the Water Colour Gallery, which we quickly leave, sighing, "How unlike that beautiful and attractive section of the Art Treasure Exhibition at Manchester in 1857!" Hastening into the Central Picture Gallery, we are much struck with the different appearance it presents, and find numbers of ladies and gentlemen admiring the numerous productions by painters belonging to the various foreign schools. Among these works are some grand subjects, both in historical and ideal composition, and landscape representations. This gallery has a particularly n.o.ble and handsome appearance. It is oblong, well-lighted, and open in the middle, by which means the Sculpture Hall, which is underneath, is lighted. The sides of the gallery next the open s.p.a.ce are handsomely railed round, and pedestals, with marble busts and statuettes on them, are tastefully arranged at intervals, leaving room enough for you to look down into the Sculpture Hall below. What with the fine pictures on the walls and staircase, and the n.o.ble statues in marble about and below, you cannot but come to the conclusion that this is a n.o.ble temple of art.

We next enter the east front room, which contains the works of the Belgian artists. Many of these paintings are very finely conceived and executed. The largest and most striking of them is the "Defeat of the Duke of Alencon's Troops by the Citizens of Antwerp," painted by A.

Dillens.

Now we enter the Great Picture Gallery, which is devoted to the painters belonging to the British school. Here we find many of the well-known works from the National Gallery and Kensington Museum. There are examples of the works of Callcott, Collins, Wilkie, Wilson, Turner, Landseer, Mulready, Etty, Egg, Ward, Leslie, and a host of others. Her Majesty the Queen also sends several pictures from her private collection, as examples of the works of Winterhalter, Thomas, and Stanfield. Nearly all the British artists are creditably represented in the Dublin International Art Exhibition.

We next come to the Collection of Ancient Masters in the North Gallery, which we enter from the North Corridor. To this part of the Fine Art Exhibition the Earl of Portarlington is the most liberal contributor. He sends examples of t.i.tian, Rubens, Carlo Dolci, Tintoretto, Ca.n.a.lette, Claude, Watteau, Rembrandt, Gerard Dow, Schneiders, Vandevelde, Sir Joshua Reynolds, Sir Peter Lely, and others. The Marquis of Drogheda also sends several examples of the same masters, some of them very fine ones. Sir Charles Coote sends a great many paintings; among them a Murillo, a Guido, and a Gainsborough.

Thence we pa.s.s into the Mediaeval Court, where we find nothing but croziers, sacramental cups and plates, carved panels for pulpits and clerks' desks, reminding us of "responses" and "amens." These we leave to Churchmen, enthusiastic Puseyites, and devotees of Catholicism. And we wend our way round the galleries, pa.s.sing through Switzerland and Italy into the United Kingdom, where we stop to examine some of the art manufactures peculiar to Ireland, and are particularly interested in the specimens of Irish bog oak, carved most tastefully into various ornaments, such as brooches, pins, paper-knives, &c., and sculptured into humorous and characteristic statuettes. The most noticeable of that cla.s.s of Irish art and industry is a clever group, ent.i.tled, "Where's the man that dare tread on my coat?" This really humorous and artistic statuette is one of a group of two. One is a rollicking Irishman brandishing his shillelagh over his head and trailing his coat on the ground, which is the Irishman's challenge for a fight at such places as Donnybrook Fair. The other Irishman, who is equally ready for a "row,"

is in the act of treading on the coat, as an acceptance of the challenge. The story is so cleverly told, that we almost fancy we see the fight begin, and hear the shillelaghs cracking crowns in a genuine Irish row.

Pushing on through India to the British Colonies again, whence we started, we descend to the ground floor, and resume our survey of Sweden, Norway, Italy, and Rome, and turn into the Music Hall, which is on the south side of the entrance and Statuary Hall. Here we find the organ builders at work on the grand organ, blowing up one pipe after another, and producing such volumes of inharmonious sounds that we are glad to leave them to the full and hearty enjoyment of their pipes, chords, discords, and bellows-blowing. The walls of the Music Hall are nearly covered with cartoons and paintings of a high-cla.s.s, some of them so high that we require an opera-gla.s.s to bring them within the range of our visual organs.

We next enter the Sculpture Hall with a view of examining the statues and describing them carefully. But they are so numerous that we can only find s.p.a.ce to call attention to the most striking. There are over three hundred pieces of sculpture from various countries, comprising colossal and life-size figures, groups, busts, statuettes, and alto-relievos in marble and bronze. The most attractive of the marble statues are "Michael Angelo, when a child, sculpturing the head of a Faun" (his first work), by Emilio Zocchi, of Florence. The earnestness of purpose and devotion to his task are wonderfully expressed in the countenance of the boy-sculptor. Plying the hammer and chisel actively and vigorously, every part of the figure betokens a thorough abandonment to his occupation. A very remarkable work by a lady sculptor--Miss Harriett Hosmer--ent.i.tled "The Sleeping Faun," is the very opposite to the other, in its complete abandonment to repose. This fine statue has been purchased by Mr. Guiness, and we were told he had given a munificent sum for it. Another piece of exquisite beauty and daring skill in marble working is "The Swinging Girl," by Pietro Magni, of Milan, the sculptor of "The Reading Girl," which attracted so much attention in the International Exhibition of 1862. The figure of the girl swinging is beautifully modelled, and entirely free from contact with the base; and is supported only by the swing attached to the branch of a tree, and the hand of a boy giving action to the subject. "Ophelia," by W. C.

Marshall, is perhaps the most poetic conception of the loveliest and most mournful of Shakespeare's creations that has ever been sculptured.

It is almost impossible to look at this touching representation of Ophelia in her madness without exclaiming, in a modified quotation of her own description of Hamlet--

"O, what a gentle mind is here o'erthrown."

But we must stop. To go on in this way describing all the beautiful works of art in the Dublin Exhibition would fill a volume. Already we have allowed our admiration to carry us beyond the limits we had a.s.signed ourselves. We have been tempted to describe more than photographic works, but none that have not a value artistically or otherwise to photographers. We recommend all our readers that possibly can to go and see for themselves. The trip is a very pleasant one, and need not be expensive; nor need much time be spent unnecessarily. A week's absence from business will give you five clear days in Dublin, the other two only being occupied in travelling. Five days will be amply sufficient to see the Exhibition and the "extraneous lions" of Dublin also. If your time is limited, give a carman a job to "rowl" you to the princ.i.p.al places of interest. But "by all means" select a rough, ragged, red-headed, laughing-faced Irishman for your jarvey, and depend upon it he will keep you in good humour during the whole of your trip. And every time you come to a public-house he will say his "horse wants a dthrink,"

and "Won't yer honours have a dthrop?" as if he was going to stand treat; but of course you know what he means; besides, the idea of allowing a carman to treat his fare is not to be entertained for a moment, nor can you resist the good-humoured intimation of his desire to drink your health, for which honour, as a matter of course, you pay costs.

Having endeavoured to conduct our readers to Dublin, and give them a glance at the Exhibition, photographically and generally, we shall now take our leave of the capital of Ireland, and return to town in much the same manner as we went. We leave the Irish capital at 1.30 in the afternoon, and, after a pleasant and quiet run across the Channel, enter Holyhead harbour about seven o'clock. This arrangement gives you an opportunity of seeing the Welsh coast to the best advantage as you approach. Stepping into the train which is waiting our arrival, we are speedily on our way home. At Rugby we have to change, and wait a little; but before leaving there we pa.s.s the sign which only old masons and travellers know, and are provided with a first-cla.s.s bed and _board_, and so make ourselves comfortable for the night. We know nothing more of the remainder of the journey. Old Somnus has charge of us inside, and an old kind-hearted guard takes care of us outside, until we are aroused by the guard's "Good morning, gentlemen!" about six o'clock, a.m., within a few miles of Euston Square. In conclusion, we sincerely recommend as many of our readers as can to take a trip "to Dublin and back," and a glance at the Dublin International Exhibition.

PHOTOGRAPHY IN THE NORTH.

On a recent journey northwards, I was tempted to stop at York, take a look at the Exhibition there, and see if there were anything worth notice in the Photographic Department. That part of the Exhibition is exceedingly scanty, but the best Yorkshire photographers are well represented, both in landscape and portraiture. Among the contributors are the names of Sarony, Glaisby, Holroyd, Gowland, and other well-known names. Mr. Sarony exhibits a couple of frames containing several "new photo-crayons," cartes-de-visite vignettes, which are very sketchy and effective, exhibiting those free and "dashy lines" and "hatchings" so characteristic of the "softening off" of artistic crayon drawings. This effect may be produced by a process of double printing, but it is more likely to have been obtained direct in the camera from a screen, having the edges of the aperture "softened off" with some free touches, the screen, in all probability, being placed between the lens and the sitter. Mr. Sarony also exhibits some large photographs very beautifully finished in colours. Messrs. Gowland exhibit, in a revolving case, a very unique collection of medallions and vignettes, both plain and coloured, mounted on tinted grounds, which give the pictures a very chaste and delicate appearance. The photographs themselves are exquisite bits of artistic pose and careful manipulation. They also exhibit a charming vignette of twenty-nine young ladies, all cleverly arranged, each figure sharp and distinct, and evidently recognisable portraits.

This picture reminds one of Watteau, for the figures are in the woods, only, instead of semi-nude nymphs, the sitters are all properly and fashionably dressed young ladies. Messrs. Holroyd contribute some very excellent cartes-de-visite and enlargements. Mr. E. C. Walker, of Liverpool, exhibits some very beautiful opalotypes, or "photographs on enamelled gla.s.s." Mr. Swan, Charing Cross, London, also sends specimens of his crystal cube portraits. Mr. A. H. Clarke, a deaf and dumb photographer, exhibits some very good groups of the Princess of Wales, Lady Wharncliffe, Lady Maud Lascelles, Countess Granville, and the Hon.

Mrs. Hardinge, taken in the conservatory, when the Princess and suite were on a visit to Studley Royal, Yorkshire.

Amongst the landscape photographs are to be found some of Bedford's finest views of Egypt and Jerusalem, Devonshire and Warwickshire, the beauties of which are so well-known to everyone interested in photography. Some of the local views by local artists are very fine; W.

P. Glaisby's views of York Minster are capital, especially the interiors. Messrs. Jackson Brothers, of Oldham, exhibit some very fine views, and show what atmospheric effects the camera is capable of rendering. That view of "Birstall Church" is a perfect master-piece of photo-aerial perspective. There are also a considerable number of photographic productions from the South Kensington Museum. Mr. Gregson, of Halifax, exhibits some excellent photographs of machinery. In apparatus there is nothing novel or striking, there being but one case of cameras, &c., exhibited by a London maker. There is a "water agitator" in the machinery "annexe," for washing photographic prints, but the invention is more ingenious than effective, for the water is not agitated sufficiently, except in the immediate neighbourhood of the fan or "agitator," which moves backwards and forwards in the water, in a manner somewhat similar to the motion of the pendulum of a clock, and so laves the water to and fro; but the force is not sufficient to prevent the prints from lying close together at the extremities of the trough, and imperfect washing is sure to be the result. The motion is given to the "agitator" by the water falling on a small wheel, something like "Williams's revolving print washing machine."

To describe the Exhibition itself: It is rather like a "compound mixture" of the church, the shop, and the show. The "Great Hall" is something like the nave of a wooden cathedral, with galleries running all round, and a grand organ at the end, peeling forth, at intervals, solemn strains of long measure. Over the organ, in white letters on a red ground, is the quotation, "He hath made all things beautiful in his time."

The show cases on the floor of the Grand Hall are arranged as indiscriminately as the shops in Oxford Street. In one case there are exhibited samples of Colman's mustard, in that next to it samples of "Elkington and Co.'s plated goods," and in another close by are samples of saddlery, which give the place more the business aspect of a bazaar than the desirable and advantageous cla.s.sification of an exhibition.

Then you are reminded of the show by the frequent ringing of a loud bell, and cries of "This way to the fairy fountain, just going to begin, only twopence." Such things jar on the ears and nerves of quiet visitors, and are only expected in such a place as the Polytechnic in London.

The great features of the York Exhibition are the picture galleries; and here a better order of things prevails. The collections are cla.s.sified; one gallery, or part of it, being devoted to the works of the old masters, another to the modern, and another to the water-colours. Among the old masters are some fine portraits by Velasquez, Tintoretto, Rembrandt, Vand.y.k.e, Sir Joshua Reynolds, Gainsborough, Sir Peter Lely, and others. And some of those grand old landscapes by Salvator Rosa, Rubens, Claude, Wilson, the English Claude, and George Morland, such pictures as are rarely seen out of private collections. The modern masters are abundantly represented by Wilkie, Etty, Frith, Westall, Faed, Cope, E. Nicol, Stanfield, Linnell, and a host of others. Amongst the water-colours are many fine examples of the works of Turner, the Richardsons (father and sons), Birket Foster, &c., &c.

Sculpture is very faintly represented, but there is a charming little Canova, Dirce, exhibited by Lord Wenlock; an antique bust of Julius Caesar, which seems to have been found in fragments and carefully joined together. This bust is exhibited by the Hon. P. Downay, and was found in Rome amongst some rubbish, while some excavations were being made. There is also an interesting series of marble busts of the Twelve Caesars, exhibited by Lord Londesborough. The Exhibition is open in the evening, and brilliantly lighted with gas till ten o'clock; and, taking it "all in all," it is a very creditable effort in the right direction, and does honour to York and Yorkshiremen.

Further north still, at Newcastle-on-Tyne, there is another exhibition of "Arts and Manufactures," the chief photographic feature of which is a considerable display of "Swan's Carbon Prints," from several well-known negatives by Bedford and Robinson. The promise of this process is very great, and its commercial advantages were singularly demonstrated to me when visiting the printing establishment of Mr. Swan, which I happened to do on a dark and unfavourable day--one totally unfit for silver printing; and yet I saw several very beautiful carbon prints that had been produced that day, the rate of production being about eight to one over silver printing. As a proof of the certainty and commercial application to which Mr. Swan has reduced his beautiful process, I need only mention that he has undertaken the printing of two thousand copies of the celebrated picture of "The First General a.s.sembly of the Church of Scotland," painted by D. O. Hill. This historical picture contains four hundred and fifty portraits: the negatives were taken from the original painting by Mr. Annan, photographer, Glasgow, and are 32 by 14 inches, and 24 by 9 inches; and Mr. Swan has to turn off one thousand copies of each within a given time. The publishers of the work give a guarantee to their subscribers that every print shall be of a high standard, for each one has to pa.s.s the examination of two competent judges. They also very justly pride themselves on being the very first to translate and multiply such n.o.ble works of art by a process "so beautiful, and, at the same time, _imperishable_." I saw several of the prints, both in process of development and complete; and anything more like rich, soft, and brilliant impressions of a fine mezzotint engraving I never saw, by any process of photography.

Mr. Swan's arrangements for conducting the various parts of his process are very extensive and complete; and his mode of "developing and transferring" seems to be the very acme of perfection. But, as Mr. Swan is about to publish a work containing a full description of the process, with a beautiful specimen print as frontispiece, I will not antic.i.p.ate him, or mar his own comprehensive account of the details of a process which he has brought to such a state of beauty and perfection, by an amount of patient perseverance and thoughtful application rarely exhibited or possessed by one individual.

I also visited the photographic establishment of Messrs. Downey in Newcastle, and there saw some _cabinet pictures_ of the Princess of Wales, taken recently at Abergeldie Castle. Messrs. Downey have just returned from Balmoral with upwards of two hundred negatives, including whole-plate, half-plate, and _cabinet_ size, which will be published in one or all those sizes, as soon as the orders of Her Majesty have been executed. From the well-known reputation of the Messrs. Downey as photographers, it is, in all probability, a treat in store for the lovers of photography, to get a sight of their latest works at Balmoral and Abergeldie.

Mr. Parry, another excellent photographer in Newcastle, was also making arrangements to introduce the new cabinet size picture in a style that will insure its success.

Altogether, the movements of the best photographers in the North are highly commendable, and, with their notoriously practical minds, there is little doubt of their undertakings becoming a success. Let us hope that the same elements of energy and "push" will speedily impregnate the minds of all photographers, and create a combination that will develop a new form of popular beauty, and result in forming a salt that will savour their labours, produce deposits of gold, and create innumerable orders of merit.

ERRORS IN PICTORIAL BACKGROUNDS.

We have recently had a few papers on the necessity of art culture and art knowledge in relation to photography, but they have chiefly been of a theoretical and speculative character, few, if any, a.s.suming a practical form. "Apply the rod to teach the child" is an old saying, and our artist friends and teachers _have_ applied the rod and belaboured photography most unmercifully, but they have _not_ taught the child.

They have contented themselves with abusing photographers for not doing what was right, instead of teaching them how to avoid what was wrong.

It will be my endeavour to point out, in this paper, some errors that have crept into photographers' and artists' studios, and I hope to be able to suggest a remedy that will lessen these evils, and elevate photography in the scale of art. The faults in pictorial backgrounds that I invite your attention to, arise from the neglect of the principles of linear and aerial perspective. I do not speak of the errors in perspective that may exist in the backgrounds themselves, viewing them as pictures; but I refer to the manifest fault of depicting the sitter--the princ.i.p.al object--according to one condition of perspective, and the background that is placed behind him according to another. An unpardonable error in any work of art, whether photograph or painting, is to represent a natural object in an unnatural position. By this I do not mean an awkward and constrained att.i.tude, but a false position of the princ.i.p.al subject in relation to the other objects by which it is surrounded. We frequently see portraits, both full-length and three-quarter size, with landscape backgrounds--or a bit of landscape to be seen through a painted or actual window--of the most unnatural proportions in relation to the figure itself. The head of the subject is stuck high in the heavens--sometimes so high that, in relation to the painted landscape, nothing shorter than a church steeple could attain such an alt.i.tude. The trees and castles of the pretty landscape, supposed to be behind the sitter, are like children's toys; the mountains are like footb.a.l.l.s in size, and the "horizon" is not so much in relation to the figure as the width of a fishpond is to a man standing on one side of it. It must be admitted that artists themselves have set this bad example of departing from truth to give increased importance to their subjects by placing their figures against diminutive backgrounds; but that is a liberty taken with nature which photographers should neither imitate nor allow. Photography is, in all other respects, so rigidly truthful that it cannot consistently sanction such a violation of natural laws.

Pictorial backgrounds have usually been painted on the same principle as a landscape picture, and one of the earliest things the painter has to determine is, where he shall represent that line where the sky and earth appear to meet--technically, the _horizontal line_. This settled, all the lines, not vertical or horizontal in the picture, below this are made to appear to rise up to it, and those above descend, and if all these are in due proportion the perspective is correct, no matter whether this governing line is a.s.sumed to be in the upper, lower, or middle part of the picture. A painter can suppose this imaginary line to be at any height he pleases in his picture, and paint accordingly. In photography it is invariable, and is always on a level with the lens of the camera. To ill.u.s.trate the relation of the horizontal line to the human figure, when a pictorial background is to be introduced, let us imagine that we are taking a portrait out-of-doors, with a free and open country behind the person standing for his carte-de-visite. The camera and the model are, as a matter of course, on the same level. Now focus the subject and observe the linear construction of the landscape background of nature. See how all the lines of the objects below the level of the lens run up to it, and the lines of the objects above run down to it. Right across the lens is the horizontal line, and the centre is the point of sight, where all the lines will appear to converge.

Suppose the lens to be on a level with the face of the subject, the horizontal line of the picture produced on the ground gla.s.s will be as near as possible as high as the eyes of the subject. Trees and hills in the distance will be above, and the whole picture will be in harmony.

This applies to interior views as well, but the ocular demonstration is not so conclusive, for the converging lines will be cut or stopped by the perpendicular wall forming the background. Nevertheless, all the converging lines that are visible will be seen to be on their way to the point of sight. Whether a natural background consisted of an interior, or comprised both--such as a portion of the wall of a room and a peep through a window on one side of the figure--the conditions would be exactly the same. All the lines above the lens must come down, and all that are below must go up. The following diagrams will ill.u.s.trate this principle still more clearly.

[Ill.u.s.tration: Fig. 1.]

[Ill.u.s.tration: Fig. 2.]

Fig. 1 is a section of the linear construction of a picture, and will show how the lines converge from the point of observation to the point of sight. Artists, in constructing a landscape of an ordinary form, allot to the sky generally about twice the s.p.a.ce between the base and horizontal lines. But for portraits and groups, where the figures are of the greatest importance and nearer to the eye, the proportion of sky and earth is reversed, so as to give increased value to the princ.i.p.al figures, by making them apparently larger, and still preserving the proper relation between them and the horizontal line (see fig. 2). This diagram represents the conditions of a full-length carte portrait, where the governing horizontal line is on a level with the camera. If a pictorial background, painted in the usual way, with the horizontal line low in the picture, is now placed behind the sitter, the resulting photograph will be incongruous and offensive. It will be seen, on referring to fig. 2, that all the lines below the horizon must of necessity run up to it, no matter how high the horizontal line may be, for it is impossible to have two horizons in one picture; that is, a visible horizon in the landscape background, and an imaginary one for the figure, with the horizontal line of the background far below the head of the figure, and the head far up in the sky. The head of a human figure can only be seen so far above the horizontal line under certain conditions; such as being elevated above the observer by being mounted on horseback, standing on higher ground, or otherwise placed considerably above the base line, none of which conditions are present in a studio. Whenever the observed and observer are on the same level, as must be the case when a photographer is taking the portrait of a sitter in his studio, the head of the subject could not possibly be seen so high in the sky, if the lens included a natural background instead of a painted one. As, for convenience, the painted background is intended to take the place of a natural one, care should be taken that the linear and aerial perspectives should be as true to nature as possible, and in perfect harmony with the size of the figures. The lens registers, on the prepared plate, the relative proportions of natural objects as faithfully as the retina receives them through the eye, and if we wish to carry out the illusion of pictorial backgrounds correctly, we _must_ have the linear construction of the picture, which is intended to represent nature, as true in every respect as nature is herself.

Aerial perspective has not been sufficiently attended to by the painters of pictorial backgrounds. There are many other subjects in connection with art and photography that might be discussed with advantage--such as composition, arrangement of accessories, size, form, character, and fitness of the things employed; but I leave all these for another opportunity, or to someone more able to handle the subjects. For the present, I am content to point out those errors that arise from neglecting true perspective, and while showing the cause, distinctively supply a remedy.