APPENDIX. 



SYNOPTIC CONVERSION OF ENGLISH AND METRIC UNITS. 



Metric to English. 



Units of length. 



I metre (lo'' microns). 



(i 

 I kilometre. 



Units of area. 



I square centimetre. 



1 square metre. 

 (I 11 



I hectare. 



1 square kilometre. 



Units of volume. 



I cubic centimetre. 



I cubic metre or stere. 

 11 it 11 



Units of capacity. 



I litre (61.023 cubic inches). 



I hectolitre. 



1 1 



Units of mass. 



T gramme. 



I kilogramme. 

 <i 



<( 



39.3700 

 3.28083 

 (.09361 

 0.62137 



English equivalents. 



inches, 

 feet, 

 yards, 

 miles. 



0.15500 

 10.7639 



I- 19599 

 2.47104 

 0.38610 



square inches, 

 square feet, 

 square yards, 

 acres, 

 square miles. 



0.0610234 cubic inches. 

 35.3145 cubic feet. 

 I '30794 cubic yards. 



Logarithms. 



1-595 165 

 0.5159^4 

 0.038 863 



9-793350- 10 



9. 190 331 -10 

 1.03 1 96S 

 0.077 726 

 0.392 880 

 9.586700 — 10 



8.785 496 — 10 



1-547 953 

 0.1 16 589 



0.26417 gallons (U. S.). 



1.05668 quarts (U. S.). 



0.21993 Imp. gallons (British). 



2.83774 bushels (U. S.). 



2.7512 bushels (British). 



15.4324 grams. 



2.20462 pounds avoirdupois. 



35.274 ounces avoirdupois. 



32.1507 ounces troy. 



0.98421 tons (2240 lbs.). 



3.2808 

 2.2369 

 0.62137 



feet per second, 

 miles per hour, 

 miles per hour. 



I tonne. 



Units of velocity. 



I metre per second. 

 t( 11 11 



r km. perhr. (0.2778 m. per sec.) 

 Units of force. 



I dyne (weight of (981)-' grammes, for^ = 981 cm.) = 7.2330 X 10 



Units of stress — in gravitation measure. 



0.014223 pounds per sq. inch. 

 0.20482 pounds per sq. foot. 

 14.7 pounds per sq. inch. 



-in absolute measure. 



foot-poundals. 



9.421 884 — 10 

 0.023 944 

 9.342 291 — 10 

 0-452 973 

 0.439 523 



1. 188 432 



0-343334 

 1.547454 • 

 1.507 191 

 9.993 086 — 10 



0.515984 



0.349 653 

 9-793350-10 



I gramme per square centimetre. 

 I kilogramme per square metre. 

 1 standard atmosphere. 



Units of work 



poundals. 



{See def. p. 259.) 



I erg. 



I megalerg 



7.2330 foot-pounds. 



2.3730 X 10- 

 108 ergs ; i joule ^= 10' ergs. 



— in gravitation measure. 



I kilogram-metre (for ^ = 981cm.) =981 X 10* ergs 



Units of activity (rate of doing work). 



I watt. 44-2385 foot-pounds per minute, for ^ = 981 cm. 



I watt = I joule per sec. = 0.10194 kilogram-metre per sec, for_^ = 981 cm. 

 I force de cheval = 75 kilogram-metres per sec. = 735! watts = 0.98632 horse-power. 



Units of heat. 



1 calorie or kilogramme-degree = 3-9^8 pound-degrees, F. — 2.2046 pound-degrees, C. 

 I small calorie or therm, or gramme-degree = o.ooi calorie or kilogramme-degree. 



Smithsonian Tables. 



261 



