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SUMMARY OF CURRENT RESEARCHES RELATING TO 



C33 Cutting-, including: Imbedding' and Microtomes. 



Leitz's "Support" Microtome. — The speciality of this microtome 

 (fig. 56j whicli is on the Schanze model, consists in the motion given to 



Fm. 56. 



the knife, which is not actuated by hand, but by the handle seen on the 

 right, by which the knife is made to pass over the section. 



Taylor's Combination Microtome.* — Dr. T. Taylor's microtome is 

 adapted to three methods of section cuttings. The instrument is of 

 metal screwed to a block of polished mahogany. There is a revolving 

 table with graduated margin in the centre of which is fitted a freezing 

 box having two projecting tubes, one to admit freezing water, the other 

 as an outlet for it. The water is supplied from the reservoir and carried 

 off by means of rubber tubing attached to these metal tubes, the terminal 

 end of the outlet tube being furnished with a small glass tube, by which 

 means a too rapid outflow of water is prevented. The tubes of the 

 freezing box are so arranged as to prevent their revolving with the 

 revolutions of the table. 



When ether is used a little brass plug in front of the freezing box 

 is removed and the rubber tubing detached. 



In preparing to make sections, remove the freezing box altogether, 

 and in its place substitute a cork, which projects suitably and presents the 

 object from which sections are to be taken, imbedded in wax or paraffin, 



* The Microscope, ix. (1889)'pp. 4-5 (1 fig.). 



