Page:Handbook of Meteorology.djvu/272

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1 pound troy =12 oz
  =5760 grains
=372.631 grams
=0.373 2 3 kg
1 ounce avoirdupois =437.5 grains
  =0.0625 lb
=28.35 grams
1 ounce troy =480 grains
  =0.0833 lb
=31.1 grams
1 metric ton =0.9842 long tons
  =1.1023 short tons
=2204.62 lbs
=1000 kg
1 kilogram =2.20462 lb av
  =2.6792 lb troy
=35.274 oz av
=33.140 oz troy
1 gram =15.432 grains
  = 1000 mg
=1 cu cm water
1 grain =0.0648 gram

Work Equivalents

1 horse power
1 horse po  =33,000 ft lb per min
=1,980,000 ft lb per sec
=273,746 kg meters
=2,685,443 joules
=2544.99 lb
=641.326 kilo
1 Br. therm, unit =1 lb 1° F
  =778 ft lb
=0.252 kg C°
=107.56 kg meters
1 joule =0.7373 ft lb
  =0.102 kg meter

1 kilogrammeter
1 kilogrammete  =7.89 h p min
=0.1315 h p sec
=7233 ft lb
=0.8 met h p min
=0.0133 rnet h p sec
=9.81 joules
1 kilogram degree C°
1 kilogram degree  = 3087.35 ft lb
=3.968 deg lb F°
=426.84 kg meters
1 metric horse power
1 metric horse  =1,952,910 ft lb (hour)
=2,648,700 joules

Precipitation

1 acre foot =43, 500 cu ft
  =325,850.58 US gal
=0.6234 U S gal per sq ft
=1233.46 cu meters
=1344.2 tons
1 acre inch =3630 cu ft
  =27154.21 U S gal
=102.8 cu meters
=112.01 tons
1 acre centimeter
1 acre ce  =0.24542 U S gal per sq ft


Atmospheric Equivalents

t = 32° P = 29.92 in or 760 mm
1 cubic yard of air =2.17888 lb av
  =988.615 grams
1 cubic foot of air =0.807 lb av
  =565.061 grains
=36.615 grams
=1.291 oz av
1 atmosphere =29.921 in of mercury
  =760 mm of mercury
=33.9 ft of water
=14.7 lb per sq in
=1.0333 kg per sq cm