FIG, 39. SUBBA RAO'S WATER-LIFT (PLAN). 



FIG. 40. SUBBA RAO'S WATER-LIFT (SECTION). 



preponderates and the bullock has to walk to the free end 

 of the platform to tilt the longer segment up and lower the 

 bucket into the well. The platform is 24 feet long and the 

 supporting roller is fixed 15 feet 3! inches from the working 

 end." The weight of the two sections of the platform is 

 1450 Ibs. and 850 Ibs. respectively. To diminish the shock 

 when the free end falls and the bucket is lowered into the 

 water, 23olbs. of iron rails are fastened underneath the 

 platform by a short chain, so that just before the end of the 

 platform reaches its lowest position, the rails rest on the 

 ground and their weight ceases to act, and the platform 

 comes to rest more gently than would be the case, if the 

 velocity of descent continued to accelerate to the very end. 

 The ropes from the platform are wound round drums, the 

 circumference of which is 3 feet 2\ inches as measured by 

 unwinding one coil of the rope, and the m6t rope is worked 

 from a drum 7 feet 10 inches in circumference, so that the 

 motion of the working end of the platform is multiplied 

 2-443 times. Mr. Subba Rao told me he intended substituting 

 chains for ropes as ropes lengthen in time and the efficiency 



