PREFACE TO THIED EDITION. 



-•o*- 



The success of this little work has greatly 

 exceeded the author's most sanguine expectation, 

 upwards of 7,000 copies having been already 

 sold. A new edition being now required, he 

 gladly avails himself of this opportunity to make 

 several important additions, consisting of fresh 

 matter interspersed with woodcuts, descriptive of 

 the construction of the Compound Microscope and 

 its various appendages. 



The Publisher hopes that it may, in its 

 present shape, meet with the same favorable 

 reception, and prove a still more useful and 

 reliable guide to the Amateur Microscopist. 



8, Savile Row. Xv^ '^^ >v 



E. L. 



uu: Ll^ ' '^' 



