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8auscK"[omb 



Microscopes 



— made in many models to meet 

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 manufacture is based upon fifty 

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Write today for our new Microscope 

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Bausch &Ipmb Optical©. 



*KW TOftK WAtHIMCTON CHICAOO •».« fAAMCttcW 



toKooN ftoCHESTEft.N.Y. (rM »«ww?? 



Cocoa sold by 

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(Chicago University) 



ill 



Illustration shows 5-»n. with pneumatic dock. 



OBSERVATOR IBS 



Specula, Planes, Eyepieces, etc. 

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LOHriANN BROS. 



GREENVILLE, OHIO 



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