1048 



SUMMARY OF CURRENT RESEARCHES RELATING TO 



plato from tho body of the iustrument. la the new instrument, tbo 

 size of tho three supporting pillars and screws is so much reduced that 



Fig. 183. 



the conducting surface is not greater tlian in the old microtome. The 

 arrangement for cutting imbedded sections consi.sts of a tube (fig. 183) 

 which fits the principal well of the microtome, and within which fits a 



hinged part similar to an ordinary vice. With 

 the instrument are i)rovidcd the means of pre- 

 paring paraffin blocks for imbedding sections. 

 When it is intended to use the micro- 

 tome for imbedding, the etber-spray, spray- 

 bellows, and ether-bottle should be re- 

 moved, and the freezing-tube, having been 

 raised as far as possible by means of the 

 princijjal screw, should then be withdrawn 

 from the well. The imbedding-tube is now 

 placed in the well, and, having been pushed 

 down until it rests upon the point of the 

 large screw, it may be lowered to a convenient height by working the 

 large screw backwards. 



The instrument is made by Mr. 

 Thin Sections. — In opposition 



A. Frazer, of Edinburgh. 



to the note of the Editors of 



the 



' Microscope ' {ante, p. 671), Dr. J. E. Eeeves contends* that " the proper 



The Microscope, viii. (1888) pp. 252-5. 



