THE MICROSCOPE. 149 



ous by Mr. Culpepper, and Mr. Scarlet." Notwithstanding the 

 decided improvements made by these men, by way of reducing in 

 size, etc., the instrument still did not suit Dr. Baker's idea of a good 

 working stand. So in 1743 in speaking to Mr. Cuff, he mentioned 

 the inconvenience of the legs about the stage, of pulling the tube up 

 and in focussing and the absence of a good opaque illuminator. 

 The result was a microscope by Cuff with stage free from legs, ap- 

 plied a fine threaded screw for delicate focussing and added a con- 

 cave speculum for opaque objects, he does not state in what particu- 

 lar this latter differs from Leuwenhoek or Lieberkuhn. This is the 

 first mention we have of screw adjustment in compound micro- 

 scope, and the introduction of the idea of moving of the entire body 

 by the fine adjustment. 



1747. Mr. Cuff devised a micrometer for this instrument con- 

 sisting of a net-work of silver wires, meshes of which were -^'' placed 

 in focus of ocular, which in connection with stage micrometer gave 

 all necessary measurements. While speaking of Dr. Baker, I feel 

 constrained to append a paragraph from his "Microscope made 

 easy," although it may not be pertinent to the subject. 



Mr. Baker gives some very good advice that should be reiterat- 

 ed in all text books of the present day. "Beware of determining 

 and declaring your opinion on an object too suddenly, for imagina- 

 tion presently gets the start of judgment, and makes people believe 

 they see things which better observers will convince them could not 

 possibly be seen. Therefore assert nothing till after repeated ex- 

 periments and examinations in all lights and all positions. 



When using microscopes shake off all prejudice and opinion. 

 R emember that truth is the matter you are in search of, and if you 

 are mistaken let no vanity seduce you to persist in your mistake. 

 Pass no judgment on things out of their natural state. Don't use 

 any higher glass than is necessary to distinctly see your object. 



THE MICROSCOPE AND MEDICINE.* 



BY GEO. E. FELL, M. D., BUFF.A.LO, N. V. 



CURSORY examination of the pages of several of our Ameri- 

 can medical journals revealed the fact, that very little space was 

 devoted to the microscope and its value in medical research. One 



A 



* Read before the Buffalo Medical and Surgical Association, September, 1882. 



