320 NOTE ON A NEW HAND MICROTOME. 



The third part, C, which is of solid metal, rests directly on the 

 micrometer screw. It runs up through B, the object-holder 

 proper, and by means of a screw serves to protrude just so much 

 material as is required. Should the amount of material exposed 

 be found insufficient, after a number of sections have been made, it 

 is only necessary to release the clamp screw D, and advance C by 

 screwing, thus forcing out the material from the clamp, the latter 

 having been first released, if necessary, by means of A. The 

 clamp screw D serves also to prevent the metal carrier projecting 

 through the stage, and thus injuring the knife. This is effected 

 by so regulating the position of the upper edge of the large slot 

 (see Fig. 1) that the milled head reaches it before the carrier has 

 quite reached the top of the stage. By means, however, of the 

 narrower slot, into which the milled head T> will just pass, it is 

 possible to push the carrier out of the body of the microtome 

 when required. 



Journ. Quekett Microscopical Club, Scr. 2, Vol. VII. , No. 46, April 1900. 



