CHAS. LENTZ & SONS 
pocket magnifiers, etc. 
No. 2092 No. 2090 No. 2094 
2090. Simple Microscope, on Brass Tripod $0 
This microscope has a large lens of about i inch focus, 
mounted in a brass rim, which is adjustable for focus by a screw 
in the frame, and which in turn is supported on three legs. It 
is a very convenient instrument for elementary work in botany, 
etc., and for counting colonies of bacteria in Petri dishes. 
2092. Magnifiers, Folding, oval shape, in rubber case, with i lens. 
Diam. oflens ... f i li i| 2 inches. 
Price, each . . . $0.30 .40 .60 .70 .90 1.15 
2094. Magnifiers, Folding, oval shape, in rubber case, with 2 lenses. 
Diam. of lens . | & | | & i & i^^ i J & & i| i| & 2 inches. 
Price, each . $0.50 .65 .85 1.10 1.65 2.15 
2096. Magnifiers, folding, bellows shape, in rubber case, with 3 lenses. 
Diam. oflens ^, f & I f , I & i f, | & 1 inch. 
Price, each $0.80 1.00 1.30 
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