used in the East. 29J 



together at top, and sunk into the earth at proper distances 

 below. 



Fig. 1. presents the elevation, and fig. 2. the section of 

 the machine. 



At the summit of the triangle is fixed a pulley a ; lower 

 down, and nearly as high as the reservoir b, there is a pulley 

 or wheel c which turns upon pivots. The cord d, which is 

 attached to the large aperture of the bucket e, passes into 

 the pulley a; another cord J, fixed to the extremity of this 

 funnel e, passes over the wheel c, and boih are fastened 

 to a windlass. 



If we suppose the bucket e at the bottom of the well, 

 it will be filled with water ; and when the windlass is turned 

 and the cords are stretched, it begins to ascend ; the small 

 end of the bucket e is folded up ; in this position the water 

 which it contains cannot escape, this extremity being as 

 high as the large aperture. By always drawing at once the 

 two cords d and J', the bucket e mil preserve the same 

 position, until it rises to the edge of the well ; but when it 

 arrives to the height of the reservoir, the small extremity 

 passes above the wheel c, the other ascends to the pulley c, 

 the bucket e is unfolded, assumes the real form of a funnel, 

 the office of which it performs, and the water finally escapes 

 by the lower aperture, and falls into the reservoir b. The 

 windlass immediately goes round ; the bucket e, resuming 

 its first position, redescends by its proper weight to the 

 bottom of the well, where it is again filled: the windlass 

 turns round again, and makes the bucket ascend a second 

 time, and so on. It will be seen from this, that in a little 

 time the reservoir b is filled, and afterwards pours the water 

 by a gutter into a lower basin, from which it may be dis- 

 tributed over the whole garden. 



It ought lo be nevertheless remarked, that ihcre is some 

 time lost in the return of the windlass ; but this return may 

 be made useful, by placing the windlass across the middle 

 of the well, but so that the handle g may come to one 

 side, between two machines : then we shall have two 

 reservoirs bb; each of the cords J'/\ attached to the 

 small end of each bucket <?e, after having passed over the 

 pulley cc, vvill traverse the reservoir // i^, pas,^ under another 

 parallel pulley ii, and will reiurn to unite wilh each of the 

 cords in the pullev rt a : the lour cords will be fixed by 

 their extremity to the windlass, so thai, by being unrolled 

 and developed successively, one of the buckets will be 

 filled at the bottoiu of ihe well, while the other will empty 

 il5tlf into the reservoir. 



Ta 



