The Bausch & Lomb Auxograph 



For Demonstrating and Recording Plant Growth 



is a practical instrument for educational use which 



possesses the following advantages: 



Prominence of Record 



Ease and Simplicity of Adjustment 



Comparative Accuracy 



Durability 



Ready Portability 



Principle and Operation Perfectly Apparent 



PRICE, complete, $25.00 



Ask for Catalog 



Bausch & [pmb Optical (o. 



NEW YORK WASHINGTON CHICAGO SAN FRANCISCO 



london ftOCHESTEIl. NY. ™ ANKFORT 



Leading American Makers of Microscopes, Projection Apparatus (Balopticons), 

 Photographic Lenses, Binoculars and other High Grade Optical Products 



