1834,] On the mode of raising Water in India, 160 



II. — On the mode of raisi?2g Water in India, 



To The Editor of the Madras Journal 



of Literature and Science. 



Sir, 



I "beg leave to forward herewith to be deposited in the mu- 

 seum of the Literary Society a rustic model of a machine for raising 

 v/ater. 



2. I have the pleasure to scud also a coloured sketch shewing 

 the manner in which the principles of the machine may with facility 

 be reduced to practice ; and a guide sketch with references to the 

 several parts of the mechanism. Where there are trees upon the 

 spot, they may be made part and parcel of the machine itself with- 

 out injury to them ; and where there are not, strong posts or trunks 

 of trees, sunk in the ground, will prove eftectual substitutes, 



3. A post A, see guide sketch, firmly fixed and braced, forms the 

 centre point on which the mill beam or lever B. acts. The post is 

 shaped into the form of a pin at its upper end, and this pin passes 

 through a hole made near the end of the lever B. The other end 

 of the lever has affixed to it, in the usual manner, the draft yoke 

 for the bullocks; — and it has several holes pierced along it to suit 

 different depths of water. Suppose the diameter of the mill track 

 to be 30 feet ; then the pin and swivel C. fixed at 4, may be assum- 

 ed to raise water to the height of 25 feet; but rf the pin and swivel 

 C. be fixed at 1, it may then be assumed to raise water to the 

 height of only 10 feet. It is clear that water may be raised to any 

 height within the diameter of the mill track, simply by shifting the 

 swivel C. along the beam, nearer to the centre or further from jt, 

 for if it be fixed at 1, and suppose 1 to be 5 feet from the centre, 

 then when the beam is in the opposite part of the mill track, that 

 point 1 will be 5 feet from the centre on the left hand of the sketch, 

 or 1 0 feet from its original position ; and so on with respect to any 

 other distance the swivel may be fixed at, the water being neces- 

 sarily raised to this height because it is to the swivel that the bag 

 rope is attached. The enlarged sketch shews the form of the swivel 

 and pin more accurately. The pin must be made of Iron , and 

 should fit tight into the beam or lever. 



4. The ropes are double for each bag. The fines D. D. represent 

 two ropes, one for raising the water, the other to be fixed to the 

 spout of the bag for discharging the water. These ropes run paral- 

 lel to, and alon^ with eack other through the pullies E. F, from C, 



