PEEFACE TO THE FIEST EDITION. 



TN bringing this Handbook before the public, the 

 Author believes that he is supplying a want which 

 has been long felt. Much information concerning 

 the " Preparation and Mounting of Microscopic 

 Objects " has been already published ; but mostly 

 as supplementary chapters only, in books written 

 professedly upon the Microscope. From this it is 

 evident that it was necessary to consult a number 

 of works in order to obtain anything like a com- 

 plete knowledge of the subject. These pages, 

 however, will be found to comprise most of the 

 approved methods of mounting, together with 

 the results of the Author's experience, and that 

 of many of his friends, in every department of 



