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PRACTICAL MICROSCOPY. 



the plug of considerable length, moved upwards by means 

 of a good firm screw, while the cutting plate is of steel. 

 If this microtome were so arranged that it could be used in 

 a freezing mixture, the writer would not hesitate to place 

 it in the first rank, and even before that of Professor 

 Rutherford. The well being square the subject cannot 

 revolve, and no "rise" takes place when the correct bedding 

 agent is employed. 



A form of microtome designed by Mr. Williams and 

 made by Messrs. Swift and Son, is shown in Fig. 175. It 



FIG. 175. 



is specially designed for use in the freezing process, and 

 has been admirably described in the Journal of the Quekett 

 Club. Not having used it the author can but give his 

 opinion that the principle upon which it is constructed is 

 good, though there seems to be very little superiority over 

 Professor Rutherford's. 



