The weight of water in air is like the weight of as much lead in water, or like the weight of marble in distilled nut oil.

(¹⁰ - o (?) - p n 11 t - S - 9 11 - 10 - g r h - e f - a o b - c d

The leather of the bellows should receive ...

To what density the air must be compressed in order to make the water rise.

The weight is 10. The pipe holds 9. The lever is 1. The motion pours 1. The lever is 11. The counterweight is 1. The weight that presses between the air and f is water; but if such a weight stands under water it loses its weight, and to remake in water a weight that weighs like water in air, take lead.

To make the motion ovonit noc, take distilled nut (olive) oil, and with this you will make that motion, and let its site be at a b c d. The aforesaid motion will be generated by the prime mover; let it be g h, which with 9 of lever n r and one of counter-lever n o will lift 9 at e f. And when g h undoes its weight, e f regains its lost power and descends the space f o and raises the lever n r to the height t, whence it first descended; where, having regained its heaviness, it falls again from t to r, and so it does always for as long as the instrument lasts.

e f is 9 of weight and o n is somewhat less than 9, so that the descent of e f drives the liquid n S into the spout n t, and when the lightened lever n r returns to t it grows heavy again by one, and that one descends with a power of more than 9, because the lever n r has a length of more than 9 against one n o of counter-lever; and by such power regained at r, e f, a weight of 9, is raised again and remains with a power of 9.