8-4 A M.UllINK FOU CUTTING IIAUD SECTIONS. 



imparting the requisite feed to the material to be eut the followini;' 

 contrivance is adojited : — Beneath the stage plate A is secured a 

 tube M (shown detached in longitudinal section at Fig. 3.) 

 Sliding freely inside this tube is a solid cylinder N. This cylinder 

 is pressed by a spiral spring against a micrometer screw P. 

 On the upper side of the cylinder N is secured by screws a lever 

 arm Q. This lever arm carries at one end a counterpoise weight 

 R, and is furnished at the other end with a clamp and binding screw 

 S. The material to be cut — say a piece of bone — is fastened by any 

 suitable cement (such as glue) to a slip of wood T, and this slip is 

 clamped, as shown in the plate, to the end of the lever arm Q. 

 By turning the micrometer screw P the cylinder N will be driven 

 forward, carrying with it the lever arm Q and the piece of bone to 

 be cut. 



The counterpoise R will now cause the piece of bone to bear 

 upwards against the teeth of the saw, and a rapid reciprocating 

 motion being imparted to this latter, as already explained, a thhi 

 slice will be cut off. This operation may be repeated until the 

 whole of the material is cut up. The slices can then be removed 

 from the wooden slip by soaking in a little warm water. 



A grooved pulley V is provided on the crank-shaft in order that 

 the machine may be driven by a fly-wheel and treadle if desired, and 

 saws of different degrees of fineness may be employed to suit the 

 various materials required to be cut. 



