PART III. 

 MICROTOMES : THEIR CHOICE AND USE. 



INTEODUCTION. 



The scope of the following chapters on the Choice and 

 Use op Microtomes has been limited to aiding the beginner 

 and directing his steps towards the attainment of ultimate 

 success, and not with the purpose of adding to the know- 

 ledge of the expert worker. 



An endeavour has been mad'e to explain in the simplest 

 manner — as far as the limited space at command would 

 permit — the routine of practical laboratory work. Occa- 

 sionally the text may appear to savour of pleonasm ; for 

 such apparent redundancy forgiveness is asked, on the 

 ground that an explanation of difficulty has been attempted 

 without ambiguity, instead of its being merely alluded to 

 as if beneath notice, or, after the manner of lexicographers, 

 omitted altogether. 



It will also be noted that upon occasion a very decided 

 opinion has been delivered. The reason for this is that 

 the purpose of these pages is to place stepping-stones for 

 the student in positions athwart the stream where the 

 water may be deep. It is the hope of the writer that the 

 stepping-stones may be found where required by the tyro 

 at his first attempts in the fascinating art and science of 

 microtomy. 



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