Pendulum Machine.

92

[Book 1.

Various forms of the gutters are figured, (the heads of some like largebowls,) as well as modes of working them. See figure No. 32.

No. 32. Combination of Levers and Gutters.

There is another modification of the jantu, by which water may beraised to great elevations. A number of gutters, open at both ends, arepermanently connected to, and over each other, in a zigzag direction, sothat while one end of the lowest dips in the water, its other end inclinesupwards at an angle proportioned to. the length of the gutter and themotion tobe given to it, and is United to the lower end of the next one,which also inclines upwards, but in an opposite direction, and is United tothe next, and so on, the length of each diminishing as it approaches thetop, as in the following figure.

No. 33. Pendulum or Swinging Gutters.

In the bottom of each, an opening is made and covered by a flap orvalve to prevent the water, when once past through, from returning. All