Our name, backed 

 by over half a cen- 

 tury of experience, 

 is on all our pro- 

 ducts — lenses, mic- 

 roscopes, field 

 glasses, laboratory 

 apparatus, engi- 

 neering and other 

 scientific instru- 

 ments. 



The Advancement of 

 Science 



is partly due to the advancement of 

 microscopes, of which ours are in the 

 forefront of popularity because of their 

 optical accuracy and mechanical per- 

 fection. 



{Jauscli [omb 



Microscopes 



represent the highest standard o> 

 expert workmanship and are made 

 in different models to meet the re- 

 quirements of elementary or ad- 

 vanced student. 



Write for new Microscope Catalog and "Manual 

 of Elementary Microscopy." Address Dept. 8 D. 



Bausch i & Ipmb Optical <§. 



'HEW TOOK WASHINGTON CHICAGO IAN rtt AH CISCO 



i-oHooN ROCHESTER,, K.Y r****r$Xl^ 



Cocoa 



Made from Cocoa Beans of 

 the Highest Grades only. 



THE ACKNOWLEDGED BEST 

 IN THE WORLD. 



Quality Higher than Price. 



Price within the reach 

 of all. 



Cocoa sold by 

 dealers every- 

 where in 25c, 15c and 

 10c cans. 



* t * 



Refracting and Reflecting 



Astronomical Telescopes 



Standard and Portable 



Visual and Photographic 



OBJECTIVES 



Computed by our associate 



DR. F. R. HOULTON 



{Chicago University) 



OBSERVATOR IBS 



Specula, Planes, Eyepieces, etc. 



Photographs and Circulars on request 



LOHHANN BROS. 



Illustration shows 6-in. with pneumatic dock. 3KEENVILLE, OHIO 



U. S. A* 



