FACTORS AND TABLES OF EQUIVALENTS USED IN FORESTRY 5 

 Table 6. — Power; unit conversion factors, with approximate values 



Foot- 

 pounds 

 per minute 



Foot- 

 pounds 

 per second 



Watts 



Kilogram- 

 meters per 

 second 



Force de 

 cheval 



Horse- 

 power 



Kilowatt 



j 



0. 01667 



0. 0226 



0.0023 











[Ho] 



(H5) 











60 



1 



1 35582 



138255 



0. 00184 



0. 00182 





44. 2537 



0. 73756 



an) 

 ii 



0. 101972 



0. 00136 



0. 00134 



0.001 



(45) 



(%) 





(Ho) 









433. 9799 



(434) 



32, 548. 5 



7. 23300 



9. 80665 



(10) 



735. 499 



1 



0. 01333 



0. 01315 



0. 0098 



542. 475 



75 



2 1 



0. 98632 



0. 7355 













(1) 



(%) 



33, 000 



550 



745.7 

 (750) 



76. 04 



1. 01387 

 (1) 



1 



0. 7457 

 (%) 



44, 253. 7 



737. 56 



1,000 



101. 972 



1. 3596 



1.34/ 



1 



(45, 000) 







(100) 



(1H) 



(IX) 





1 1 watt =10? ergs per second =1 joule per second. 

 1 1 force de cheval =1 metric horsepower. 



Table 7. — Weight as applied to length; unit conversion factors, with approximaU 



values 



Grains per 



Pounds per 



Pounds per 



Pounds per 



Grams per 



Grams per 



Kilograms 



inch 



yard 



foot 



inch 



meter 



centimeter 



per meter 



1 



0.005143 

 (Hoo) 







2. 551133 

 (2H) 



0. 0255/ 

 (Ho) 











194. 444 



1 



0.333 



0. 027778 



496. 054 



4. 96054 



0. 496054 



(200) 





m 



[H& 



(500) 



(5) 



(H) 



583. 333 



3 



1 



0. 08333 



1488. 16 



14. 8816 



1. 48816 



(600) 







[Ha] 



(1500) 



(15) 



(1H) 



7,000 



36 



12 







178. 579 



17. 8579 



0. 391983 



0. 002016 



0. 000672 



0. 000056 



n 



(180) 

 0.01 



(18) 

 0.001 



(H) 











[Moo] 



[Hooo] 



39. 198 



0. 20159* 



0. 067197 



0. 005600 



100 



1 



0.1 



(40) 



(H) 



(Ms) 



(Hoo) 









391. 9826 



2. 01591/ 



0. 67197 



0. 055998 



1,000 



10 



1 



(400) 



(2) 



m) 











1 gram per meter =3.5480 pounds per mile=l kilogram per kilometer. 



Table 8. 



■Weight or pressure as applied to area; 1 unit conversion factors, with 

 approximate values 



Pounds per 

 square foot 



Pounds per 

 square inch 



Feet of 

 water col- 

 umn or 

 head 2 



Kilograms 



per square 



meter 



Grams per 

 square cen- 

 timeter 



Milli- 

 meters of 

 mercury 

 column 3 



Atmos- 

 pheres 



1 



144 



62. 4283 



0. 204817 



(H) 



2. 04817 



(2) 

 2. 784578 

 (2%) 

 2, 116. 28 



0. 006944 



[H44] 

 4 £ 



0. 433530 



0.001422 



0. 01422 



(Ho) 



0. 019337 



(Ho) 



14. 6964 



(14Ho) 



0.016018 



(Ho) 



2.3066^5 



81 



0.00328/ 

 0.0328/ 



0. 044604 

 33. 8993 



4. 8824/ 



(5) 



703. 067 



304. 80/ 



10 

 6 13. 59545 

 10, 332. 54 



0. 48824/ 



(H) 

 70. 3067 



(70) 

 30. 480/ 



0.1 



1. 359545 



(1H) 

 1, 033. 254 





0. 000473 



0. 068044 

 (Ms) 



0.029499 



(Hs) 



0. 0000968 



(Hoooo) 



0. 000968 



0. 001316 



81 



51. 7134 



22. 4193 

 (221/2) 





7 1 



760 



I Pressure unit = 1 barye = l dyne per square centimeter =0.0010197 gram per square centimeter =0.010197 

 kilogram per square meter = (approximately) 0.000001 atmosphere. 1 megadyne=10 6 dynes per square 

 centimeter = .98692 atmosphere. 



» At 4° C, or 39.2° F. 



* At 0° O., or 32° F. 1 inch of mercury column=70.728 pounds per square foot= 1.132954 feet of water = 

 345.325 kilograms per square meter =25.40005 millimeters of mercury =0.03342/ atmosphere. 



* 1 pound per square inch =0.072 ton per square foot. 



» 1 foot of water = 0.882648 inch of mercury =0.30480/ meter of water. 

 6 The specific gravity of mercury at 0° C. 



I I millimeter of mercury =0.03937 inch of mercury =0.013595 meter of water. 

 » 1 atmosphere =29.9212 inches of mercury =10.332542 meters of water. 



