WATER POWER AND ELECTRICAL DEVELOPMENTS 7 



Company. This installation took place in 1889 and consisted of 

 two 300-H.P. Victor wheels belted to 4000-volt single-phase gen- 

 erators, the power being transmitted to Portland, 13 miles distant. 

 In 1890, shortly after the Willamette Falls Electric Company 

 had completed their installation, the Telluride Power Company 

 installed at Ames, Col., two 150-Kw. single-phase generators 

 directly connected to Pelton water wheels operating under a head 



FIG. 3. Power House, Mississippi River Power Company, Keokuk, Iowa. 



of 500 feet. Power was transmitted to Telluride, a distance of 

 5 miles, at 3000 volts. 



In 1892 another single-phase transmission plant was installed 

 in California and delivered power to Pomona, approximately 13 

 miles distant, and about 29 miles to San Bernardino. The voltage 

 at the beginning of operation was 5000, which was higher than 

 any previously used commercially, but on February 16, 1893, 

 this was raised to 10,000 volts, and on May 2, 1893, by connecting 

 their transmission lines all in series, 120 kw. was carried 42 miles 

 with a transmission efficiency of 60 per cent, at that time a great 



