But Mary realized fully that at such a time as this Tom must give all his thought and energy to the task in hand. She was proud of Tom's ability and took a deep interest in his inventions.

"I want to see the test when you try the locomotive, Tom," she told him, when she came to the shops the first time to look at the monster locomotive. "What a wonderful thing it is!"

"Its wonder is yet to be proved," rejoined the young inventor. "I believe I've got the right idea; but nothing is sure as yet."

In addition to his mechanical contrivances inside the locomotive, Tom had to arrange for an increased supply of electric power to drive the huge machine around the track that was being built inside the stockade.

A regular station had to be built for receiving the electricity in a 100,000-volt alternating current and delivering it to the locomotive in a 3,000-volt direct current. Therefore, this station had two functions to perform--reducing the voltage and changing the current from alternating to direct.

The reduction of the voltage was accomplished as follows: The 100,000-volt alternating current was received through an oil switch and was conveyed to a high-tension current distributor made up of three lines of copper tubing, thus forming the source of power for this station.

From the current distributor the current was conducted through other oil switches to the transformers--entering at 100,000 volts and emerging at 2,300 volts. Then the current was conducted from the transformers through switches to the motor-generator sets and became the power employed to operate them.

The motor generator consisted of one alternating current motor driving two direct current generators. The motor Tom established in his station was of the 60-cycle synchronous type, which means that the current changes sixty times each second.

There were two sets, each generating a 1,500 or 2,000 volt direct current; and the two generators being permanently connected, delivered a combined direct current of 3,000 volts--as high a direct voltage current, Tom knew, as had ever been adopted for railroad work. The current voltage for ordinary street railway work is 550 volts.

"I could run even this big machine," Tom explained to Ned Newton, "with a much lighter current. But out there on the Hendrickton & Pas Alos line the transforming stations deliver this high voltage to the locomotives. I want to test mine under similar conditions."

"This is going to be an expensive test, Tom," said Ned, grumbling a little. "The cost-sheets are running high."

"We are aiming at a big target," returned the inventor. "You've got to bait with something bigger than sprats to catch a whale, Ned."

"Humph! Suppose you don't catch the whale after all?"

"Don't lose hope," returned Tom, calmly. "I am going after this whale right, believe me! This is one of the biggest contracts--if not the very biggest--we ever tackled."

"It looks as if the expense account would run the highest," admitted the financial manager.

"All right. Maybe that is so. But I'll spend the last cent I've got to perfect this patent. I am going to beat the Jandels if it is humanly possible to do so."

"I can only hope you will, Tom. Why, this track and the overhead trolley equipment is going to cost a small fortune. I had no idea when you signed that contract with Mr. Bartholomew that so much money would have to be spent in merely the experimental stage of the thing."

Ned Newton possessed traits of caution that could not be gainsaid. That was one thing that made him such a successful financial manager for the Swift Company. He watched expenditures as closely now as he had when the business was upon a much more limited footing.

The rails laid along the inside of the stockade made a two-mile track, as well ballasted as any regular railroad right of way. In addition the overhead equipment was costly.

To eliminate any possibility of the trolley wire breaking, a strong steel cable, called a catenary, was slung just above the trolley wire.

To this catenary the trolley wire was suspended by hangers at short intervals.

These cables were strung from brackets so that a single row of poles could be used, save at the curves, at which cross-span construction was used. The trolley wire itself was of the 4/0 size, and was the largest diameter copper wire ever employed for railroad purposes.

Several weeks had now pa.s.sed since the great locomotive had been a.s.sembled in the erection shed and the cab of the locomotive completed.

It really was a monster machine, and any stranger coming into the place and seeing it for the first time must have marveled at the grim power suggested by the mere bulk of the structure.

When the day of the first test arrived Tom allowed only his most intimate friends to be present. Mary Nestor accompanied Mr. Swift into the shops at the time appointed, and she was as excited over the outcome of the test as Tom himself.

Ned Newton and the mechanical force of the shops knocked off work to become spectators at the exhibition. The only other outsider was Mr.

Damon.

"Bless my alternating current!" cried the eccentric gentleman. "I would not miss this for the world. If you tried to shut me out, Tom, I'd climb over the stockade to get in."

"You'd better not," Tom told him, dryly. "If you tried that you'd get a worse shock than any chicken thief will get that tries to steal your buff Orpingtons."

Chapter XIII

Hopes and Fears

Tom climbed into the huge cab of the electric locomotive. In fact, the cab was the most of it, for every part of the mechanism save the drivers was covered by the eighty-odd foot structure. From the peak of the pilot to the rear b.u.mper the length was ninety feet and some inches.

As Tom slid the monster out upon the yard track the small crowd cheered. At least, the locomotive had the power to move, and to the unknowing ones, at least, that seemed a great and wonderful thing.

What they saw was apparently a box-car--like a mail coach, only with more high windows--ten feet wide, its roof more than fourteen feet from the rails, its locked pantagraph adding two feet more to its height.

Just what was in the cab--the water and oil tanks, the steam-heating boiler to supply heat and hot water to the train the monster was to draw, the motors and the many other mechanical contrivances--was hidden from the spectators.

In fact, since completing the electrical equipment of the Hercules 0001, as Tom had named the locomotive, the young inventor had allowed n.o.body inside the cab, any more than he allowed visitors inside his private workshop. Even Mr. Swift did not know all the results of Tom's experimental work. In a general way the older inventor knew the trend of his son's attempts, but the details and the results of Tom's experiments, the latter told to n.o.body.

But as the huge locomotive rolled into the yard and followed the more or less circular track inside the yard fence, it was plain to all of the onlookers that the motive-power was there all right! Just what speed could be coaxed from the feed-cable overhead was another question.

Nor did Tom Swift try for much speed on this first test of the Hercules 0001. He went around the two-mile track several times before bringing his machine to a stop near the crowd of onlookers. He came to the open door of the cab.

"One thing is sure, Tom!" shouted Ned. "It do move!"

"Bless my slippery skates!" exclaimed Mr. Damon, "it slides right along, Tom. You've done it, my boy--you've done it!"

"It looks good from where I stand, my son," said Mr. Barton Swift.

It was Mary who suspected that Tom was not wholly satisfied--as yet, at least--with the test of the Hercules 0001. She cried:

"Tom! is it all right?"

"Nothing is ever all right--that is, not perfect--in this old world, I guess, Mary," returned the young inventor. "But I am not discouraged.

As Ned says, the old contraption 'do move.' How fast she'll move is another thing."

"What time did you make?" asked Mr. Swift.

"Not above fifteen miles an hour."

"Whew!" whistled Ned dolefully. "That is a long way from--"

Tom made an instant motion and Ned's careless lips were sealed. It was not generally known among the men the speed which Tom hoped to obtain with his new invention.

"It is a wide shoot at the target, that is true," Tom said, soberly.