ALTERNATING GENERATORS AND SYNCHRONOUS MOTORS. 
Specific Ohmic Resistance of Copper: 
At a temperature of 135°F. = 57°C.: 
8/107 ohm for 1 inch length and 1 square inch section; 
O08 Se re Saag ‘““ 1 ‘* millimeter section, . 
Peripheral Speed: 
1,000 feet per minute = 5,08 meter per second. 
Specific Pressure: 
1 lb. per square inch = 0.07 kg. per square centimeter. 
Power and Energy Units: 
1 English horsepower = 746 wate. 
1 Metric ss se Tae 2 
1 foot pound = 0.138 kilogrammeter. 
