APPENDIX. 



SYNOPTIC CONVERSION OF ENGLISH AND METRIC UNITS. 



English to Metric. 



Units of length. 



I inch. 

 I foot. 

 I yard. 

 I mile. 



Units of area. 



I square inch. 



I square foot. 



I square yard. 



I acre. 



I square mile. 



Logarithms. 



0.404835 

 9.4S4016 — 10 

 9.961 137 - 10 

 0.206650 



o. 809 669 

 2.968 032 

 9.922 274 — 10 

 9.607 120 — 10 

 0.413 300 

 2.4i;?3oo 



Units of volume. 



I cubic inch. 

 I cubic foot. 

 I cubic yard. 



Units of capacity. 



I gallon (U. S.) = 231 cubic inches. 



I quart (U. S.) 



1 Imperial j);allon (British). 



277.463 cubic inches (1890). 

 I bushej (U. S.) =2150.42 cubic inches. 

 I bushel (British). 



Units of mass. 



16.3872 cubic centimetres. 

 0.02S317 cubic metres or steres. 

 0.76456 cubic metres or steres. 



1. 214 504 

 8.452 047 

 9.883 411 



10 

 10 



3.78544 litres. 

 0.94636 litres. 

 4.5468 litres. 



35-2393 litres. 

 36.3477 litres. 



T grain. 



I pound avoirdupois. 



I ounce avoirdupois. 



I ounce troy. 



I ton (2240 ibs.). 



Units of velocity. 



I foot per sec. (0.681S miles per hr.) 

 I mile per hr. (1.46667 feet per sec.) 



Units of force. 



64.7989 milligrammes. 



0.4535924 kilogrammes. 

 28.3495 grammes. 

 31.1035 grammes. 



1. 01605 tonnes. 



0.578 116 

 9.976056 — TO 

 0.657709 



1.547027 

 1.560477 



1. 811 568 

 9.656 666 — 10 



1-452 546 

 1.492 809 

 0.006 914 



: 0.30480 metres per sec. = 1.0973 km. per hr. 

 0.44704 metres per sec. = 1.6093 km. per hr. 



I poundal. 



Weight of I grain (for^ — 9S1 cm.). 



Weight of I pound av. (for ^ = 981 cm.). 



Units of stress — in gravitation measure. 



13825.5 dynes. 



63.57 dynes. 



4.45 X 10* dynes. 



I pound per square inch 

 I pound per square foot 



70.307 grammes per sq. centimetre. 

 4.8824 kilogrammes per sq. metre. 



4. 140 682 

 1.803 237 

 5-648335 



1.846 997 

 0.688634 



5.624697 



0.138255 kilogram-metres. 



Units of WOrlc — in absolute measure. 



I foot-poundal. 421 403 ergs 



— in gravitation measure. 



I foot-pound (for ^ = 981 cm.) = 1356.3 X 10* ergs 



Units of activity (rate of doing work). 



I foot-pound per minute (for ^ = 981 cm.) =0.022605 watts. 



i horse-power (33600 foot-pounds per min.) = 746 watts = 1.01387 force de cheval. 



Units of heat. 



I pound-degree, F. = 252 small calories or^gramme-degrees, C. 



I pound-degree, C. 



1.8 pound-degrees, F. 



Smithsonian Tables. 



260 



