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METHODS OF MICROSCOPICAL RESEARCH. 



length of the cutting edge evenly. This is best done 

 by taking care to rub the edge on the stone in such 

 a way that every portion of its length is upon the 

 stone at the same time. In stropping, it will be 

 found most convenient to rest the plane iron against 

 a table edge, and push or pull the strop over it. 



The advantage of the Rutherford freezing micro- 

 tome is that it can be also used as an ordinary 

 Stirling's microtome for imbedding in carrot, paraffin 

 or wax. Its disadvantage is the same as that of 



ice freezing machines of whatever description that 

 it is cold, disagreeable work filling in the ice and 

 salt, and the former is not always to be obtained, 

 and when once charged, cutting must follow, or the 

 ice melts. 



Mr. C. Baker, 244, High Holborn, W.C., sells an 

 excellent Rutherford's freezing microtome, which, 

 of course, must have its cutting face covered with 

 plate glass. 



