Report on the Trials of Implements at Taunton. 653 
■of being of superior quality. Mr. Wood's agent, in describing!; it to the Judges, 
■stated that the driving-wheels, main-frame, toothcd-whcels, main shoe, and 
wlicels in shoe, were made of Pennsylvania cast iron. This iron has a high 
reinitation amongst engineers for its toughness and tenacity, being in the last- 
named quality nearly twice as good as ordinary English cast iron fand most of 
the wheels of locomotive and other rolling-stock on the railways of the United 
States are made of it. 
The cross and crank-shafts, the axle, cutter-bar, and knife-bar, are of cold 
rolled-iron, which is said to be stiffer and harder than ordinary bar-iron ; the 
guard-fingers and dividing-shoe are of malleable iron, steel-faced, and the con- 
necting-rod is of the best Swedish iron. 
In Fig. 25, A marks one of the travelling-wheels, 28 inches in diameter, 
upon which is cast tlie mastei^gear d, with 88 cog-teeth, each working into 
the spur-pinion x. The lower ends of the standards for the driver's seat are 
inserted into the cast-iron pole-socket rasting on the main axle, to which is 
bolted the pole c. p is the draught-rod attached to the main frame at s. The 
hand-lifting lever is h, and the quadrant to the same v. The draught-pole 
and bar are so placed as to balance the machine upon the main axle by the 
^yeight of the driver, and also to avoid as much as possible all unnecessary 
side strain. 
Fig. 25. — Side Elevation of Mr. Walter A. Wood's Mewing Machine, 
No. 2437. 
Fig. 26 represents a plan of the same machine. The spur-pinions x are fixed 
■on the cross-shaft g, with 12 teeth, each provided with ratchet and pawls ; so 
that if either or both wheels advance they cause the shaft to rotate. On 
this shaft is placed the bevelled-gear d, having 45 teeth, working into the 
bevelled pinion h, with 12 teeth, on one end of the crank-shaft, which is 
22 inches long, having 18 inches bearing and oilers, shown by t. The crank i 
being at the other end of this shaft, drives the connecting-rod v, 21\ inches 
long, which works the knife, making fifty-four vibrations to one revolution 
of the driving-wheel, or 7"4 to one foot. The inclination of thi« rod is 
(jj inches, the crank end being 9?, and the knife end 3 inches from the 
ground. The crank is l/^, vibrating the knife 2f inches. The main frame n 
rests upon the main axle, having hard gun-metal tubular bearings. To the 
front of the main frame 'is attached the cutter-bar J, by means of the main 
dioe E, also the lateral spring f. II shows the clutcli in and out of gear; / 
is the lever for locking the bevelled-gear ; <j is the arm of the main frame to 
support the clutch-lever. 
