The record of an experiment with a single mot conduced 

 in Madras gives the following data : "The mot was worked 



FIG. 36. THE SINGLE MOT. 



by two bullocks weighing 732 Ibs. and 616 Ibs. respectively, 

 or in the aggregate 1,348 Ibs. The bucket, which was of iron 

 and fitted with a leathern discharging trunk, weighed 43lbs. 

 and when full held 31 gallons of water, but the mean quan- 

 tity lifted, as measured into a tank, was 24-2 gallons per lift, 

 1;he rest being spilt or lost by leakage. With the bullocks 

 employed, the rate of working was 90 lifts per hour, and the 

 height of the lift being 23ft, the total quantity of work use- 

 fully done amounted to 500,940 ft. -Ibs. per hour. The draught 

 exerted by the bullocks down the inclined plane was found to 

 be 383 Ibs. The useful work done in a single lift was 24-2 X 

 10x23 or 5,570 ft. -Ibs. whilst the bullocks exerted a pull of 

 383^3. through 25^ ft. the bucket having to be raised an extra 

 2\ ft. to enable it to discharge its contents, and the work done 

 is equal to 9,760 ft. -Ibs. The bullocks then had to return up 

 a gradient of i in 5^28 ft. in doing which they expended 6,510 

 ft. -Ibs. of energy in lifting their own weight against the aclion 

 of gravity. The total amount of work done by them in a 

 single lift was therefore 16,270 ft. Ibs. and the useful outturn 

 5,570 ft.-lbs. so that the efficiency of this method of lifting 

 water is not greater than 33 per cent.' 1 



