ACHROMATIC 



QUEEN 



^ MAGNIFIERS 



TRIPLE LENSES 



QUEEN'S NEW FORMULA 



Without a doubt the best single Magnifier 

 made. Flat field, and of unusual defining power. 

 Nickel cases, folding for the pocket. 



I inch focus, magnifying about lo times . . f 5 oo 



% 



BOTANICAL AND ENTOMOLOGICAL SUPPLIES 

 Send for Catalogue BM, post free. 



Queen & Co., inc., '^'^ ^^^^*"«* st. 



^ ' PHILADELPHIA 



59 Fifth Avenue, NEW YORK 



27 



