32 Report on Miscellaneous Implements at Shrewshury, Sj-c. 
Fig. 11. — Feeding Box and Gear of Messrs. B. and A. Lister and Go's 
Seed-crushing Mill. 
lively. The following is a technical description of these new 
parts, with their attachments : — ' 
This machine has five shakers carried by cast iron brackets on the crank as 
is usual in " Good's system," and at the ends of tl;e shakers which require 
supiKDrting, and which are usually supported by rockers, these brackets have 
spring blades of wood fixed to them, which blades are then led and fixed, three 
to the bottom shoe or riddle, and two to the top shoe of the machine ; thus 
motion is imparted to the shoes which now take the place of rocker supports 
at the tied ends of the shakers, and as the shaker ends are tied by spring 
blades, a peculiar springiness of action is given them, which greatly adds to 
their efficiency ; and by the resistance of the spring blades to the centrifugal 
force of the shakers when at their highest point the tendency to wear the 
crank dips on the inside is greatly reduced. Both the top and bottom shoes 
of this machine are carried on spring hangers without pin joints in the 
usual manner, but the momentum of the shoes is largely taken up by eight 
spring blades of wood, which are fixed at their lower ends to the hind axle 
