1834.] On the mode of raising Water in India, 164 



The two pairs do. „ well angle I90 31,590 



The one pair of do. „ do. 21,060 



The Bhowrie (9) one pair of Bullocks , 13,780 



The 3 men and two oxen (10) (Bengal) 7,931 



The pickotta worked by 3 men (11) 6,300 



The do. worked by 2 men (12) (Bengal) .... 1,628 



The feeble old man (14) (Europe) 5,031 



The young man (15) (Europe) .... 6,647 



19. It will be observed how fluctuating and discrepant these re- 

 sults are, but so they must of necessity be : — the workmanship 

 and nature of the machine will make some difference, and the vari- 

 ation of animal strength and condition will make it much greater. 

 The two last examples seem to imply that the Pickotta might be much 

 improved, for one man at home appears by the last example to have 

 done as much work as 3 men in the Government Gardens, at Mad- 

 ras (11). — The Bengal practice exhibits a very low result. 



'20. We may now proceed to investigate the probable perform- 

 ance of a machine on the principle of the model herewith submitted. 



21. The Bullocks employed in the Bhowrie experiments Para. 

 8 were of a large size and the quantity of water drawn up by 

 them was 650 lbs. But large sized bullocks according to the ex- 

 periments of Para. 16 drew up and with difficulty a weight of only 

 486 lbs. It is clear therefore that the force of traction on a horizon- 

 tal plane is far less tban in a Bhowrie and that it cannot be estimat- 

 ed so high as in the foregoing experiment. The gentleman to whose 

 kindness I am indebted for these trials thought that ^ of 430 lbs. 

 (the smaller weight) would be a fair estimate for continued labour. 

 I think so too ; let us therefore fix the force of traction for a large 

 sized pair of Bullocks at 140 lbs. 



22. I have ascertained from observation that Bullocks walk in 

 a mill track at the rate of 150 to 270 feet per minute according to 

 the lightness or laboriousness of the work to be performed. As a 

 further datum let us therefore fix the measure of force for one pair 

 of strong Bullocks at 140 lbs. moving at the velocity of 200 feet per 

 minute. 



23. Then suppose a machine on the plan of the model to 

 raise waiter 27 feet high. Its effect would be as follows. — The 

 pin and swivel C. must be fixed at 13 feet 6 inches from the 

 centre, and as this happens to be a convenient mean radius for the 

 diameter of the mill track, the force of traction, and power of le- 

 verage will be equal. The velocity of the Bullocks being- 200 feet 



