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CHAS. LENTZ & SONS 
improKa Stage Construction 
OF BB AND OTHER STANDS 
The stage of the microscope is in itself one of the most important parts of the 
instrument, and one the construction of which is very apt to be overlooked by the 
purchaser. The new stages are of ample size, exactly at right angles to the 
optical axis of the microscope and perfectly rigid under manipulation, and also 
possess perfectly plane surfaces. They are not affected by reagents used and are 
durable and easy to move the object slide over. To secure these requisites the 
construction (patented) shown in the figure has been adopted. The surfaces of all 
stages, except in the cheaper stands, are of hard rubber. 
Top View and Cross-section, showing Construction df Stage and 
Iris Diaphragm 
The metal part of the stage is recessed, and the surface is covered with 
headed studs. The rubber is forced into this depression while in a plastic condi- 
tion, and vulcanized in such a manner that not only a mechanical but chemical 
union between the rubber and metal takes place. This form of stage plate will 
never warp, as plates applied with screws will do, and retains its finish indefinitely. 
For examination of colonies of bacteria in Petri dishes the stage clips can be 
removed. The colonies in the center of the dish can then be examined easily 
on account of the large size of the stage. 
