628 
Report on Cream-separators and 
machine. From the accompanying drawing it will be seen that 
the shaker-boxes themselves act as connecting-rods for driving 
the shoes, by means of the one shaft-crank, placed nearly cen- 
trally, H. There are five of these shaker-boxes, three of which, 
A, are fixed at the bottom end in flexible joints, E, attached to 
the lower shoe, ED, the ends on the other side of the crank being 
free; the other two shakers are also fixed in flexible joints ; but 
at the opposite end, at F, attached to the upper shoe, C, and free 
at the lower ends. It may be seen from this that each revolution 
of the crank gives the usual motion to the shakers, and also a 
