586 APPENDIX 



MEASURES OF TIME 



60 seconds (sec.) = 1 minute (min.) 



60 minutes = 1 hour (hr.) 



24 hours = 1 day (da.) 



7 days = 1 week (wk.) 



365K days, or 12 months = 1 year (yr.) 



10 years = 1 decade 



10 decades, or 100 years = 1 century 



UNITED STATES LIQUID MEASURE 



4 gills (gi.) = 1 pint (pt.) 231 cubic inches = 1 gallon 



2 pints = 1 quart (qt.) 31^ gallons = 1 barrel (bbl.) 



4 quarts = 1 gallon (gal.) 57.75 cubic inches = 1 liquid quart 



UNITED STATES DRY MEASURE 



2 pints (pt.) = 1 quart (qt.) 32 quarts = 1 bushel 



8 quarts = 1 peck (pk.) 67.2 cubic inches = 1 quart 



4 pecks = 1 bushel (bu.) 2150.4 cubic inches = 1 bushel 



HOUSEHOLD MEASURES (APPROXIMATE VALUES) 



1 drop = 3^o cubic centimeter 

 1 teaspoonful 5 cubic centimeters 



1 tablespoonful = 3 teaspoonfuls 

 16 tablespoonfuls = 1 cup 



2 cups 1 pint, liquid 



1 pint, liquid = 473.1 cubic centimeters 

 1 pint, dry = 550.5 cubic centimeters 



MISCELLANEOUS 



1 United States gallon of water weighs 8.33 pounds 



1 ,cubic foot of water weighs 62.3 pounds 



1 cubic foot of dry air at sea level weighs 1.23 ounces 



1 gallon of gasoline weighs about 6 pounds 



The average air pressure at sea level = 1033 grams per square centimeter, 



or 14.7 pounds per square inch 

 1 horse power = 550 foot-pounds per second or 33,000 foot-pounds per 



minute 



1 greater calorie = 3080 foot-pounds 

 1 horse power-hour = 1,980,000 foot-pounds 

 1 horse power-hour = 640 greater calories 

 1 pound of coal yields from 3000 to 3200 greater calories of heat 



