1894 THE MICROSCOPE. 181 



THE MICROSCOPE. 



New Series, 1893. 



For Naturalists^ Physicians^ and Druggists, and Designed to Popularize 



Microscopy. 



Published jnonthly. Price $1.00 per annum. Subscriptions should end 

 with the year. The old series, consisting of 12 volumes {i88i-i8g2), ended 

 with December^ i8g2. Sets of the old series cannot he furnished. All 

 correspondence., exchanges, and books for notice should be addressed to the 

 Microscopical Publishing Co., Washington, D. C, U. S. A. 



CHARLES W. SMILEY. A. M., EDITOR. 



EDITORIAL. 



Primary Dissecting Microscope. — Manufactured by the 

 Bausch & Lomb Optical Co., Rochester, N. Y. This Micro- 

 scope was designed b}^ Prof. C. R. Barnes of the University of 

 Wisconsin and has been in use in their and other laboratories 

 for several years with very satisfactory results. It is a most ef- 

 fective and low priced dissecting instiument. 



The body is a solid block of wood so shaped that the sides 

 serve as hand rests. The advantage of this is that the block 

 practically forms a part of the table on which it rests and is 

 then very steady to work upon. Mirror and movable glass 

 stage are provided for in a ver}^ simple manner. The lenses 

 are carried in an arm, the post of which slides in a metal 

 sleeve, thus allowing the entire stage to be covered and giving 

 sufficient rays and accuracy of focus. A square plate black on 

 one side and white on the other is arranged to slip under the 

 stage for dark or white ground. A groove on the lower side of 

 the block receives the plate when not in use. 



Clark's Book for Beginners. — We call attention to this book 

 again in order to offer it as a premium for two new subscribers. 

 One wholly unacquainted with the microscope may, by fol- 

 lowing the simple, clear, and concise directions, be sure of 

 reaching successful results. The processes have in all cases 

 been simplified as much as is consistent with good results. Re- 



