3. The two pinion-wheels H and G (_Tab. 26._) fixed on their arbor.

4. The same fixed to the wheel A (_Tab. 26._) by means of two cocks

_u_ and _w_ (_Tab. 26._).

5. The arbor, with the wheel L and rochet E fixed; _t_ the place,

where the wheel A is fixed.

Philosophical transactions, Vol. L. Part II. For the year 1758. Giving some account of the present undertakings, studies, and labours, of the ingenious, in many considerable parts of the world. · 第 70 / 119 题