TABLES OF MEASUREMENT 535 



I Wine fluidounce = 29.57 c.c. (approximated 30) or the volume of 455. (5 grains of 

 water at 62 F. 



1 Imperial fluidounce = 28.39 c.c. (approximated 28.5) or the volume of 437.5 

 grains of water at 62 F. 



1 Liter = 1000 c.c. = 2.11 wine pints or 1.76 Imperial pints, or 33.815 fluidounces. 

 3 Gallons of water = 25 avoirdupois pounds at 60 F. (1 Gallon = 8.331 Ibs.) 

 Mm. (millimeter) = ^ of an inch. 

 Cm. (centimeter) = f of an inch. 

 Inch = 25 millimeters or 2 centimeters. 



C.c. (cubic centimeter) = 16.23 minims or 0.27 fluidrachm or 0.0338 fluidounce. 

 Fluidounce = 29.57 cubic centimeters at 4 C. 

 Grain = 0.06479 gram or 64.79 milligrams. 

 Mg. (milligram) = 0.01543 grain (practically ^V grain). 

 Pound avoirdupois = 453.6 grams. 

 RULE. To convert troy ounces to avoirdupois add 10 per cent. 

 (The difference between a troy ounce, 480 grains, and an avoirdupois ounce, 437.5 

 grains, is 42.5 grains, or about iO per cent, of the latter. To be exact, substract 1.5 

 grains for each troy ounce.) 



RULE. To convert avoirdupois ounces to troy, subtract one-eleventh. 



f 62.425 pounds at 4 C. (39.1 F.) maximum density. 



,. , , 62.418 pounds at C. (32 F.) freezing point. 



One cubic toot of water O 



c F _ standare mperature. 



| 59.640 pounds at 100 C. (212 F.) boiling point. 

 I 57.5 pounds in form of ice. 

 1 Cubic foot water = 7.485 wine gallons. 

 1 Avoirdupois pound water = 27.7 cubic inches. 

 1 Cubic inch water = 0.03612 avoirdupois pounds. 



A pressure of 1 pound per square inch requires a depth of 2.31 feet of water. 

 The latent heat of water = 79 thermal units Centigrade (or 142.2 units Fahrenheit). 

 The latent heat of steam = 536 thermal units Centigrade (or 964.8 units Fahren- 

 heit). 



SURFACE-MEASUREMENT. 



1 Square meter = about 1550 square inches (or 10,000 square centimeters or 

 10.75 square feet. 



1 Square inch = about 6.4 square centimeters. 

 1 Square foot = about 930 square centimeters. 



ENERGY-MEASURE. 



1 Kilogrammeter = about 7.24 foot pounds. 

 1 Foot pound = about 0.1381 kilogrammeters. 

 1 Foot ton = about 310.0 kilogrammeters. 



HEAT-EQUIVALENT. 

 1 Kilocalorie = 424 kilogrammeters. 



ONE DECIMETER. 



