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.) 



