B 



ausc 



n [omD 



Pocket Magnifiers 



Coddlngton 



Triple Aplanat 



Tripod 



THE BOTANIST has constant use for a pocket magnifier and it has been 

 saitl that the man of scientific training is always known by his carrying 

 one of these useful instruments. 



The Coddington gives a good definition and wide field although, owing 

 to the construction of the lens, the corrections are not of the high order of 

 the Triple Aplanats. Supplied with magnifications of 7X, lOX, 14X and 

 20X; each, $1.50. 



The Triple Aplanat is reconmiended for the highest class of work. It 

 has a large field and perfect correction for chromatic aberration, as well 

 as for flatness, astigmatism and distortion. Its working distance is little 

 short of a simple lens of the same focus. 7.5X, lOX, 15X, or 20X, $3.50. 



The Tripod Magnifier is used for examining seeds, etc., and the magnifi- 

 cation is sufficient for this work. The focus is obtained by screwing the 

 lens up and down in the frame. Price, $0.60. 



Write for Magnifier Catalog 



Bausch ^ Ipmb Optical (o. 



NEW YORK WASHINGTON CHICAGO SAN FRANCISCO 



LONDON ROCHESTER., N.Y fl^ANKrORT 



