Part, §

 1 Pre,  2|          attached to the little beam, which was supposed to represent
 2 Exp    |         to one end of the great beam; this disk closely fits
 3 Exp    |          thus causing the great beam to follow the movements
 4 Exp    |         to the other end of the beam -- are raised to a height
 5 Exp    |        and the cylinder.~ ~Q. A beam called the ladder attached
 6 Exp    |        at the side of the great beam and consequently following
 7 Exp    |       vertical movements of the beam, thus opening and shutting
 8 Exp    | cylinder and pressing the great beam upwards, one of these pins
 9 Exp    |         destroyed and the great beam is pushed up again, because
10 Exp    |         tank. ~ ~h.h. The great beam, 30 feet long, made of 6
11 Exp    |         At the other end of the beam is also a chain with a hook
12 Exp    |        or a quadrant on the big beam 7 1/2 feet from the axis,
13   I,  3|     chain to one end of the big beam, this beam will at the same
14   I,  3|       end of the big beam, this beam will at the same time be