X PREFACE. 



the jettison of much useless matter, and on the other hand 

 there has been accorded to the matter that has been retained 

 a far ampler share than before of explanation and detail. 

 To sucli an extent, indeed, nave the instructions to students 

 and other explanatory matter been amplified that I am not 

 acquainted with any modern work on the subject that con- 

 tains anything like so complete an account of the various 

 fundamental operations of histological technique fixing, im- 

 bedding, staining, and the like. I only felt justified in 

 claiming for the first edition that it " went far to make up 

 a formal treatise on the art." Through the changes above 

 mentioned the book has come to assume altogether the 

 character of a formal treatise, and now contains in due pro- 

 portions both tlie grammar and the dictionary of the ;irt. 



The rejection of superfluous matter above referred to re- 

 lates chiefly to old methods that have been before the public 

 for so long a time that there can be no doubt that they 

 have no good claim to further survival, whilst recent methods, 

 which may be considered to be still on their probation, have 

 been treated with the accustomed fulness. 



NYON, SWITZERLAND ; 



September, 1896. 



