﻿658 
  NEW 
  YORK 
  STATE 
  MUSEUM 
  

  

  ment. 
  Making 
  some 
  allowance 
  for 
  increased 
  depth 
  of 
  water 
  in 
  

   Grasse 
  river 
  between 
  the 
  power 
  station 
  and 
  its 
  mouth, 
  when 
  

   receiving 
  the 
  tail-water, 
  and 
  also 
  some 
  allowance 
  for 
  inclination 
  

   of 
  the 
  water 
  surface 
  of 
  the 
  head 
  canal, 
  it 
  is 
  considered 
  that 
  a 
  per- 
  

   manent 
  power 
  of 
  about 
  40 
  feet 
  will 
  be 
  obtained. 
  

  

  The 
  work 
  of 
  constructing 
  the 
  canal 
  and 
  preliminary 
  work 
  on 
  

   the 
  foundations 
  of 
  the 
  power-house 
  was 
  started 
  in 
  1897, 
  at 
  which 
  

   time 
  it 
  was 
  expected 
  that 
  the 
  work 
  would 
  be 
  completed 
  in 
  1899. 
  

   The 
  St 
  Lawrence 
  Power 
  Company, 
  by 
  whom 
  the 
  work 
  has 
  been 
  

   done, 
  was 
  organized 
  under 
  the 
  laws 
  of 
  New 
  York 
  with 
  a 
  capital 
  

   stock 
  of 
  |6,000,000. 
  

  

  For 
  the 
  present, 
  work 
  uponi 
  the 
  canal 
  was 
  completed 
  in 
  1903. 
  

   It 
  has 
  an 
  average 
  depth 
  of 
  18 
  feet 
  and 
  a 
  surface 
  width 
  of 
  200 
  

   feet. 
  It 
  is 
  constructed 
  throughout 
  its 
  entire 
  length 
  in 
  excava- 
  

   tion 
  and 
  is 
  approximately 
  straight 
  throughout. 
  At 
  the 
  head 
  of 
  

   the 
  canal 
  there 
  is 
  a 
  slight 
  promontory, 
  which 
  protects 
  it 
  from 
  ice 
  

   and 
  drift 
  in 
  the 
  St 
  Lawrence 
  river. 
  

  

  At 
  the 
  Massena 
  end, 
  with 
  the 
  foundations 
  carried 
  to 
  rock, 
  a 
  

   power-house 
  designed 
  by 
  John 
  Bogart 
  of 
  New 
  York 
  and 
  Messrs 
  

   Kincaid, 
  Waller 
  and 
  Manville 
  of 
  London, 
  has 
  been 
  constructed. 
  

   It 
  will 
  be 
  nearly 
  700 
  feet 
  long 
  when 
  completed, 
  with 
  a 
  width 
  of 
  

   150 
  feet. 
  Victor 
  turbines 
  to 
  the 
  extent 
  of 
  42,000 
  horsepower 
  have 
  

   been 
  installed. 
  The 
  wheels 
  are 
  controlled 
  by 
  an 
  electric 
  governor 
  

   in 
  the 
  power-house. 
  The 
  exciter 
  wheels 
  are 
  27 
  inches 
  in 
  diameter, 
  

   two 
  to 
  each 
  exciter, 
  discharging 
  through 
  one 
  draft-tube 
  and 
  

   operating 
  at 
  275 
  revolutions 
  per 
  minute. 
  

  

  The 
  dynamos 
  are 
  of 
  6000 
  horsepower, 
  2200 
  volts, 
  3000 
  alter- 
  

   nations, 
  3-phase 
  revolving 
  field 
  type, 
  with 
  external 
  armature. 
  

   The 
  speed 
  is 
  150 
  revolutions 
  per 
  minute. 
  The 
  efficiency 
  at 
  full 
  

   load 
  96 
  per 
  cent. 
  The 
  heating 
  at 
  full 
  load, 
  continuous, 
  35 
  degrees 
  

   rise. 
  Weight 
  of 
  revolving 
  element, 
  80,000 
  pounds, 
  and 
  total 
  

   weight 
  of 
  the 
  dynamos, 
  350,000 
  pounds. 
  

  

  The 
  switchboards 
  for 
  the 
  alternating 
  current 
  machines 
  and 
  

   for 
  the 
  feeders 
  are 
  operated 
  electro-pneumatically, 
  and 
  for 
  the 
  

   exciters 
  a 
  standard, 
  direct 
  current 
  switchboard 
  has 
  been 
  installed, 
  

   with 
  hand-operated 
  switches. 
  

  

  In 
  a 
  letter 
  from 
  Mr 
  Bogart, 
  consulting 
  engineer 
  to 
  the 
  com- 
  

   pany, 
  under 
  date 
  of 
  March 
  23, 
  1904, 
  it 
  is 
  stated 
  that 
  the 
  Pitts- 
  

  

  