ference swept out by which was 3*85 times the circumference 

 of the drum. Thus Stoney's Water-lift is only an adaptation 

 of the Double-mot, where the buckets slide up two wires 

 instead of thumping against the sides, and instead of the 

 self-delivery tubes there is a tilting arrangement. 



216. Mr. Subba Rao of the Madras Agricultural Depart 

 ment has introduced an improvement in the Single Mot 

 which consists in balancing the empty mot or bucket by a 

 weight attached over a pulley. It adds considerably to the 

 expense and " it is doubtful if it contributes any real increase 

 to the efficiency of the lift, as the friction of the extra pulley 

 absorbs power and more work is thrown on the drivers 

 since the unbalanced bucket materially assists the driver in 

 climbing the steep ramp," (Bulletin No. 35, Water-lifts, by 

 A. Chatterton,B.SC,, 1897.) 



217. The Sultan Water-lift. 1\\\s is a modification of 

 the Double-mot. The buckets are balanced and is each fitted 

 with a valve which opens and allows the water to fill the 

 bucket. When new the valves are wa'er tight but they soon 

 begin to leak. The bullocks walk in a straight and horizontal 

 path and they do not need to be driven backwards. So far 

 the Sultan Water-lift has not been found acceptable, the dead 

 pull being too great for the cattle and the rope. The tilting 

 arrangement is not unlike that of Stoney's Water-lift. 



218. Subba Rao's See-saw Water-lift (Figs. 39 

 and 40 ) also, though a very ingenious contrivance, is 

 not a complete success as yet. "In this form of Water-lift 

 the bullock is made to walk along a platform supported on 

 a roller and by his weight it is caused to oscillate up and 

 down. Two ropes are attached to one end of the platform 

 and wound round to small drums forming part of a species 

 of windlass at the two ends of the large drum round which 

 a rope working an ordinary single-mot is passed. The 

 platform is not supported at the middle, but at some distance 

 therefrom, so that the working end of the platform greatly 



