FACTORS AND TABLES OF EQUIVALENTS USED IN FORESTRY 



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 



1 



60 



44. 2537 



(45) 



433. 9799 



(434) 



32, 548. 5 



33, 000 



44, 253. 7 

 (45,000) 



0. 01667 

 [Mo] 



0. 73755 



04) 

 7. 23300 



542. 475 



550 



737. 56 



0. 0226 



(Hs) 



L. 35580 



(1H) 



i 1 



9. 80665 



(10) 



735. 499 



745.7 

 (750) 

 1,000 



0.002.; 



0. 138255 



0. 10197? 



(Ho) 



1 



76.04 



101. 972 

 (100) 









0. 00184 

 0. 00136 

 0. 01333 



U 



1.01387 



(1) 



1. 3596 



(1*4) 



0. 00182 



0. 00134 



0. 01315 



0. 98632 

 (1) 



1.34/ 



OH) 





0.001 

 0. 009S 

 0. 7355 



(H) 



0. 7457 



(H) 

 l 



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

 3 1 force de cheval=l metric horsepower. 



second 



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



values 



Grains per 



Pounds per 



Pounds per 



Pounds per 



Grams per 



Grams per 



Kilograms 



inch 



yard 



foot 



men 



meter 



centimeter 



per meter 



1 



0. 005143 







2. 551133 



0. 0255/ 







(Moo) 







(2*4) 



(Mo) 





194. 444 



1 



0. 333 



0. 027778 



496. 054 



4. 96054 



0. 496054 



(200) 





m 



[Mo] 



(500) 



(5) 



(M) 



583. 333 



3 





0. 08333 



1488. 16 



14. 8816 



1. 48816 



(600) 







[Ha] 



(1500) 



(15) 



(1*4) 



7,000 



36 



12 







178. 579 



17. 8579 



0. 391983 



0. 002016 



0. 000672 



0. 000056 



il 



(180) 

 0.01 



(18) 

 0.001 



( 2 /5) 











[Moo] 



[Mooo] 



39. 198 



0. 20159/ 



0. 067197 



0. 005600 



100 





0.1 



(40) 



(M) 



(Ms) 



(Moo) . 









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 



■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 



144 



62. 4283 



0.204817 



0/5) 



2. 04817 



(2) 



2. 784578 



(2%) 



2, 116.28 



0. 006944 



[/144] 

 i £ 



0. 433530 



0. 001422 



0. 01422 



(Mo) 



0.019337 



(Ho) 



14. 6964 

 (14Mo) 



0. 016018 



(Mo) 



2. 3066*5 



0. 00328/ 

 0. 0328/ 



0. 044604 

 33. 8993 



4. 8824/ 



(5) 



703. 067 



304. 80/ 



1 



10 

 s 13. 59545 

 10, 332. 54 



0. 48824/ 



(M) 



* 70. 3067 



(70) 



30. 480/ 



0.1 



1 



1. 359545 



(1K0 



1, 033. 254 





0. 000473 



0. 068044 



(Ms) 



0. 029499 



(Ms) 



0. 0000968 



(Moooo) 



0. 000968 



0. 001316 



51. 7134 



22. 4193 

 (22M) 





71 



760 



i Pressure unit = 1 bar ye = 1 dyne per square centimeter =0.0010197 gram per square centimeter = 0.010197 

 kilogram per square meter = (approximately) 0.000001 atmosphere. 1 megadvne = 10« dynes per square 

 centimeter = 0.98o92 atmosphere. 



2 At 4° C, or 39.2° F. 



3 At 0° C., 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. 



4 1 pound per square inch=0.072 ton per square foot. 



« 1 foot of water = 0.8826*8 inch of mercury = 0.30480/ meter of water. 



6 The specific gravity of mercury at 0° C. 



7 1 millimeter of mercury = 0.03937 inch of mercury = 0.013595 meter of water. 



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



