It was 2 dial the next morning, when Cobb and Hugh reached Niagara. The night was beautiful, but the weather cold, and it was with pleasure that the two men reached the hotel, and ensconced themselves by the side of a real coal fire, as Cobb called it.

The stillness of the night was a source of surprise to Cobb, as he heard not that thundering, deafening roar of the mighty cataract which had always heretofore greeted him upon his arrival at the falls.

The next morning Cobb and Hugh were up early, and, after a hearty breakfast, proceeded in the direction of the old inclined railways where Cobb had so often, in former years, made love and talked nonsense to the pretty girls of Niagara.

A different sight met his eyes as he neared the balcony where formerly the best view of the grand falls was to be obtained. Niagara was still a mighty cataract, but not half the volume of water which had passed over its precipitous edge in former days now flowed over the walls of rock. Where formerly the great mass of surging, foamy floods rushed out over the top to a distance of fifty feet, and fell in one unbroken blue sheet into the boiling torrent below, now was a lighter sheet of white and broken water.

Two artificial streams, one on either side of the river, below the falls, the beds for which had been carved out of the precipitous banks which marked the erosive power of the stream, carried an immense flow seven miles down the river.

Along the banks, and from one hundred to seventy-five feet below the canals, were rows of houses of similar construction and color. From every house, in either line, poured forth a torrent of water which rushed and leaped down the rocks to the stream below. Electric wires and huge cables were to be seen in every direction.

Turning back from the novel scene in front of him, Cobb moved nearer the edge of the balcony, and looked over towards the base of the falls. Great masses of ice rose from the depths below, half obscuring his view; but the field was clear enough for him to ascertain that a new order of phenomena had taken place since his last advent there. It seemed as if a hundred gigantic mouths in the face of the cliff were belching forth mighty torrents of seething, foamy water.

Passing down the stairs to the first landing, which was sixty feet below the brink of the falls, he and Hugh came to the gate of a tunnel in the walls under the falls. The gatekeeper, after a few words from Hugh, touched an electric bell, and a young man who answered the summons was directed to show them about the works.

Niagara Falls had, indeed, undergone a most remarkable change in a hundred years. The face of the cliff, from the Canadian, or “Ontario” side, as it was then termed, clear around to the city, had been pierced by huge tunnels, ten feet in diameter, extending under the rapids above for a distance of 1,000 feet. There were two rows of these tunnels; the first row was 120 feet below the top of the falls, and the tunnels were twenty feet apart. The next row was cut over the walls between the lower tunnels, and was ninety feet below the edge of the falls. Again, above this line, was a row of smaller tunnels, five feet in diameter and 100 feet apart. From the two rows of large tunnels mighty jets of water were pouring out, and breaking into foam as they reached the waters coming from over the cliff.

Cobb and Hugh passed into the tunnel, which was brilliantly lighted by electricity, dry, and much warmer than the outer air. Moving onward, they soon came to the great chambers of the cliff.

“Here, Cobb,” said Hugh, as they entered the first chamber, “here are the first dynamos. This whole cliff, from the front to 1,000 feet in rear, is honeycombed with these chambers. Each chamber has a turbine wheel and a set of dynamos, and receives its water-supply through shafts drilled straight up through the roof into the waters of the rapids above. The water, after working the turbines, is discharged into the great tunnels which you saw emptying from the face of the rock. Of the mighty body of water flowing over the falls, only a portion could be used in this manner, as it was not deemed wise to make more than two rows of tunnels; but to gain as much power from the water as possible, the two lines of dynamo houses along the banks, which you saw from above, were constructed. The little tunnels are for air circulation, and fans are continually moving the air through the whole labyrinth of chambers. There are, in the face of this rock, 200 tunnels, in two rows of one hundred each, and extending back 1,000 feet, or forty miles in total length. Over each tunnel are chambers, twelve by twenty feet, with ten-foot walls between, or thirty chambers along the line of each tunnel.

“Each chamber has a fifteen-inch shaft tapping the water-supply above. Now, the descent of the water is at the rate of 3,840 feet per minute, the fall is sixty feet, and the weight of a cubic foot of water 62.5 pounds: thus the horse-power of each shaft is exactly 400, and the flow-off, in area, one square foot. As there are thirty of these chambers to each discharge tunnel, then an area of thirty square feet flows from a seventy-eight-square-foot escape. But the volume of water from the shafts, owing to its increased velocity, would soon overflow the discharge tunnels if level; to obviate this, they are inclined as much as possible. Four hundred horse-power turbines in each chamber, coupled to dynamos, give 350 electrical horses. As there are 6,000 chambers in the rock, the output, in electricity, is equivalent to 2,100,000 electrical horse-power; this, added to the power generated by the fourteen miles of dynamos along the river, which have 3,650 wheels, brings the whole power utilized up to three and a quarter millions of electrical horses. This mighty current is carried by great copper cables to all parts of eastern United States, and used for every conceivable purpose where power is required.”

“You seem to be pretty well posted in this matter,” was all Cobb could say, as Hugh gave him this array of figures.

“I am. I was on a board of engineer officers in connection with the water-power of these falls, some years ago,” he replied.

“How long have these works been in operation?”

“About fifty years.”

“So long?”

“Yes.”

“Is it a private concern?” inquired Cobb.

“Oh, bless you, no. It cost too much money to put it into operation. The government expended over two hundred millions of dollars in building the works; but they have paid for themselves almost twice over.”

“And this is the source of the great electrical supply—”

“For the Eastern States of the nation,” interrupted Hugh; “but it is only a portion of the power used. The water-power everywhere is converted into electricity, and sent over the country.”

“And steam isn’t used any more?” hesitatingly.

“To be sure, it is; in the great timber districts, and where fuel, which otherwise would go to waste, is plentiful, steam engines are still used.”

After a thorough inspection of the great center of electrical supply, the two returned to their hotel, and made preparations to leave Niagara and visit New England, and especially Boston and Providence, “the places I love so dearly,” said Cobb. “I must once more visit the scenes of my childhood, and note their advancement.”

So away they went to pass a week, intending to be in Washington by the 10th of January.