[ .6 9 ] 



per cent, and working at its normal speed, 66'6 per cent. The 

 lifts averaged mi per minute, and the animal was therefore 

 usefully employed for 52*5 per cent, of the time, and the 

 absolute efficiency of the lift as a machine for utilizing the 

 energy of the bullock is 0*66 X 52*5, or 35 per cent." 



215. Sidney's Water-Lift. The principal feature in this 

 lift is the employment of buckets of wrought iron suspended 

 in a stirrup by two adjustable pivots attached to the bucket 

 very slightly above the centre of gravity of the bucket 

 when full of water. The mouth of the bucket is inclined and 

 the lower ends of the stirrup are turned outwards and encircle 

 steel wires which are suspended in the well from screwed 

 eye-bolts attached to the framing above. The wires are 

 fastened by some convenient means to the bottom of 

 the well and act as guides to the bucket, ascending ami 

 descending, and prevent it from either turning round or 

 swaying to and fro and thus striking either the sides of the 

 well or the second bucket. On the bucket being lowered 

 into the water, it turns horizontal and rapidly fills with 

 water, and on being drawn up assumes a vertical position 

 and rises steadily out of the water till the discharging level 

 is reached, when the upper side of the inclined mouth 

 comes into contact with an iron bar fixed across the framing 

 of the lift, and the stirrup, containing its upward motion, 

 causes the bucket to revolve about the point of contact of the 

 bucket with the iron rod and thus discharge its contents into 

 the delivery trough. The lift, as arranged at Saidapet during 

 the trials, was worked by arranging the ropes which hold the 

 buckets over guide-pulleys to a whim turned by either a pair 

 of bullocks or a single bullock. Two buckets were attached and 

 the ropes arranged so that as one bucket ascended the other 

 descended and the dead weight of the bucket was balanced. The 

 whim consisted of a drum built of wood and carried by an iron 

 spindle on the top of a post firmly built into the ground. 

 The bullocks worked at the end of a long arm, the circum- 

 V 



