For a full and intelligent appreciation of the Slide Rule and its
various applications an elementary knowledge of logarithms is necessary.
All that is required will be found in this little work, which gives a
simple, detailed and practical explanation of logarithms and their uses,
particular care having been taken to elucidate all difficult points by
the aid of a number of worked examples.
Seventh Edition, 1s. 8d. Post Free.
POWER COMPUTER
for
STEAM, GAS, AND OIL ENGINES, Etc.
Gives The Indicated Horse-Power of Steam, Gas, and Oil Engines—The Brake
Horse-Power of Steam, Gas, and Oil Engines—The Size of Engine Necessary
to Develop any Given Power—The Mechanical Efficiency of an Engine—The
Ratio of Compound Engine Cylinders—The Piston Speed of an Engine—The
Delivery of Pumps with any Efficiency—The Horse-Power of Belting—The Rim
Speeds of Wheels, Speeds of Ropes, Belts, etc.—Speed Ratios of Pulleys,
Gearing, etc.
Pocket size, in neat case, with instructions and examples.
Post Free, 7s. 6d. net.