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*3 8 WEIGHTS AND MEASURES.
Table of Reduction for Pressure per Unit of Surface.
1 kilogram per sq. centimeter = 14.223 pounds per sq. inch.
1 kilogram per sq. centimeter = 0.968 atmosphere.
1 pound per sq. inch = 0.0703 kilograms per sq. centimeter.
1 pound per sq. inch = 0.06S atmosphere.
Table of Reduction for Length and Weight.
1 kilogram per kilometer = 3.548 pounds per mile.
1 kilogram per meter = 0.672 pounds per foot.
1 pound per mile = 0.282 kilograms per kilometer.
1 pound per foot = 1.488 kilograms per meter.
Weight of Water U° C.)
1 cubic cm. weighs 1 gram.
1 cubic inch weighs 0.036125 pounds = 16.386 grams.
1 liter weighs 1 kilogram = 2.2046 pounds.
1 quart weighs 2.0862 pounds -— 0.9463 kilograms.
1 cubic meter weighs 1000 kilograms = 2204.6 pounds.
1 cubic foot weighs 62.425 pounds = 28.32 kilograms.
Measure of Water.
1 kilogram measures 1 liter =1.057 quarts.
1 kilogram measures 0.353 cubic feet = 61.03 cubic inches.
1 pound measures 0.01602 cubic ft. = 0.454 liter.
1 pound measures 27.68 cubic ins. = 453.59 cubic centimeter-
SPECIFIC GRAVITY.
The specific gravity of a body is its weight as compared
with the weight of an equal volume of another body which is
adopted as a standard. For all solid substances, water at its
maximum density (4° C.) is the usual standard. For instance,
the specific gravity of zinc is 7 ; this simply means that one
cubic foot of zinc is 7 times as heavy as one cubic foot of
water. One cubic foot of water weighs 62.425 pounds. There-
fore, by multiplying the specific gravity of any solid body by
62.425 its weight per cubic foot is obtained. In the metric
system of measure and weight, one cubic centimeter of water
weighs one gram ; therefore the table of specific gravity will
also directly give the weight of the material in grams per cubic
centimeter, in kilograms per cubic decimeter, or in 1000 kilo-
grams (the so-called metric ton) per cubic meter.
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