ANNUAL ADDRESS. XXIX, 
starting, a small auxiliary motor being used to bring the large 
motor up to its proper speed, before the load is thrown on : the 
multiphase starts with strong torque and requires no auxiliary 
starting device. The General Electric Company use a three 
phase transmission system where power is required to be conveyed 
along distance. The electric power generation at Niagara, 
furnishes the most modern, and at the same time the most 
gigantic example of the utilization of water power. The works 
at Niagara comprise—(1) a head race canal 200 feet wide, 1,500 
feet long, and seventeen feet deep ; (2) a great Tunnel race 700 
feet long, twenty-one feet high, eighteen feet ten inches wide, 
with a slope of from four to seven feet per thousand, to discharge 
the tail water of the turbines into the river below the falls ; (3) 
works for the distribution of water to large consumers who erect 
their own machinery with lateral tunnels to discharge their water 
into the tail race tunnel. The Niagara Falls Paper Company 
have contracted to take 3,300 H.P. and the right of taking as 
much more subsequently. The Pittsburg Reduction Company, 
who control the patents for the production of Aluminium 
electrically, have acquired the the right to use 6,000 H.P. and 
have built works. I saw the large electric machines for these 
works in course of construction at the Pittsburg Works. (4) 
A large power station has been built and partially fitted with 
machinery for generating electricity for Niagara and Buffalo and 
Perhaps beyond: This power house is placed alongside the head 
race canal, and is designed to contain ten turbines, each of 5,000 | 
HP. Several of these generators are now working, and others I 
‘aw under construction at the Pittsburg Works. A wheel pit or 
slot has been sunk, which is at present 140 feet in length, twenty- 
One feet in width, and 170 feet in depth, having room for four 
turbines. It will be extended as required. Over this the first 
Section of the power house has been erected. 
The turbines for the power station are 5,000 H. P,, running at 
250 revolutions per minute and are placed at the bottom of the 
Wheel pit 175 feet in depth, and transmit their power to the 
