i8o 



BOOK VI. 



A — Box B — Lower part of box. C — Upper part of same. D — Clamps. E — Pipes 



BELOW THE BOX. F — COLUMN PIPE FIXED ABOVE THE BOX. G — IrON AXLE. H — PlSTON- 



RODS. I — Washers to protect the bearings. K — Leathers. L — Eyes in the axle. 



M — Rods whose ends are weighted with lumps of lead. N — Crank. 



{This plate is unlettered in the first edition but corrected in those later.) 



