Microtomes : their Choice and Use 



239 



differs in certain details. The tramways, for example, 

 are made of glass instead of metal, so that no oil is required 

 upon the sliding surfaces. The use of oil as a lubricant 

 tends to the production of irregularity in the thickness of 

 the sections. The readjustment of the micrometer screw is 

 arranged upon a more scientific principle ; the knife is 

 worked by mechanical arrangements similar to that of 

 Fig. 61. The price is rather lower than the Jung-Thoma. 

 Besides this instrument upon the Eivet model, Herr Becker 

 constructs microtomes upon the Schanze (as figured on 





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Fio. 62.— Reichert's Mioeotome. 



p. 230) and Minot models. His workmanship is of the very 

 highest class, leaving nothing to be desired, and his charges 

 are moderate. The productions of this maker are therefore 

 entitled to the consideration of microtomists. 



Reichert's Microtomes. — C. Eeichert, the optician of 

 Vienna, constructs several microtomes of merit. His new 

 continuously working micrometer screw microtome upon 

 the Eivet model is worthy of mention, and is illustrated 

 in Fig. 62. The object-holder is fixed upon the in- 

 clined plane, so that it does not jump when cutting hard 

 objects. The micrometer screw works continuously, so 



