54 



THE ANIMAL AS A MACHINE. 

 A. WORK OF A MAN.— RANKINE. 



Kind of Exertion. 



1. Raising his own weight up 



stair or ladder 



2. Hauling up weights with 



rope, and lowering the rope 

 unloaded 



Lifting weights by hand. ... 



Carrying weights upstairs 

 and returning unloaded.. .. 



Shovelling up earth to £ 

 height of 5 ft, 3 in 



Wheeling earth in barrow up 

 slope of I in 12, \ horiz 

 veloc. 0.9 ft. per sec, and 

 returning unloaded , 



Pushing or pulling horizon 

 tally (capstan or oar) 



Turning a crank or winch. 



9. Working pump. 



10. Hammering.. . . 



R 



lbs. 



40 

 44 

 143 

 6 



132* 

 26.5 



12-5 



18.0 

 20.0 

 13.2 

 15 



V 



ft. per sec. 

 and per 

 min. 



30.0 



0-75 

 45.00 

 O.S5 

 33-00 

 0.13 

 7.80 

 1-3 

 78.0 



J 0.075 

 I 4-50 

 j 2.0 

 j 120.0 

 5.0 & 300 

 2.5 & 150 

 14.4 «& B64.0 

 2.5 & 150.0 

 ? 



3600 

 (hours 

 p. day), 



RV 

 ft.-lbs. 

 per sec. 



and 

 per min , 



\ 72.5 

 ( 455-0 



i30 

 I 1800 

 (24.2 

 1 1452-0 

 j 18.5 



1 IIIO.O 



j7.8 

 ( 468.0 



) 9-9 



\ 594 -o 



j 53 



1 318.0 

 62.5; 3750 

 45 ; 2700 

 288117280 

 33; 1980 

 ? 



* Net weight of earth in the barrow. 



B. PERFORMANCE OF A MAN IN TRANSPORTING LOADS. 



Kind of Exertion. 



L 



lbs. 



V 



ft. per min. 

 and 

 per sec. 



T 

 3600 

 (hours 

 p. day.) 



LV 

 lbs. con- 

 veyed 

 I foot. 



LVT 

 lbs. 

 conveyed 

 I foot. 



11. Walking unloaded, transport 



12. Wheeling load L in 2-whld. 



barrow, relurn'g unloaded. 



13. Ditto in i-wh. barrow, ditto.. 



15. Carrying burden, returning 



16. Carrying burden, for 30 se- 



140 



224 1. 

 132 j 

 90 



140 



]■! 



\%. 



\ 100 



1 1§ 

 0 & 702 .0 

 II. 7 



23.1 & 1386.0 



10 



10 

 10 

 7 



6 



700 



373 

 220 

 225 



233 

 0 



1474.2 



25,200,000 



13,428,000 

 7,920,000 

 5,670,000 



5,032,800 







° 





