CHAS. LENTZ & SONS 
Botanical Stuaent's microscope 
OOA 
A high-grade instrument, at the lowest possible price, especially recommended 
for schools, for courses in biology and botany, and for industrial purposes. 
Especially useful also for home entertainment. 
The stand is very rigid and is not easily deranged, being made of one solid 
piece, and is neatly japanned. The base is of horseshoe form, and is large, ren- 
dering it very stable. The mirror has one plane and one concave side. 
The stage is extra large for the convenient manipulation of objects upon it, 
and is nickeled so as not to be readily affected by liquids which may accidentally 
come in contact with its surface. 
The action of the coarse adjustment is so perfect that a fine adjustment screw 
is unnecessary, even with the one-fifth inch objective. 
The main tube has society screw and draw tube. 
OOAl. Stand OOA, with i eyepiece and *^ inch special objective leader . $14 00 
OOA2. Stand OOA, with 2 eyepieces and *^ inch special objective ... 16 OO 
OOA3. Stand OOA, with i eyepiece and *.i inch and 1- inch special 
objectives 20 OO 
00 A4. Stand OOA, with 2 eyepieces and *A inch and i inch special 
objectives 22 00 
00 A5. OOA4 and double revolving nosepiece 27 00 
* This objective is divisible, the back combination being a iH inch lens. 
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