Apparatus for Projection and 
Photo^micrography. 
*Large photo-mierographie Apparatus. 
(Fig. 47.) 
The general arrangement of this apparatus has remained the same as that 
described at some length by Dr. Rod. Zeiss in our "Specialkatalog iiber Mikro- 
photographie" (German)*) and briefly sketched out in the last edition of our 
catalogue (No. 28, pp. 76 to 79). In detail, however, the apparatus has been 
subjected to reconstruction with the object of removing some of the difficulties 
attending manipulation and also in order to render the apparatus still better 
fitted for projection on a screen, both with high magnifications involving the 
interposition of a microscope and with very low amplifications obtainable with 
special low power projection lenses of long focus. 
These modifications relate to the mechanical arrangement of the table 
upon which the microscope or projection-stand, the source of light and the inter- 
vening auxiliary apparatus are mounted. 
As in the original apparatus this table is isolated from the camera — which 
is only required for photography but not for projection. Table and camera are 
mounted on separate stands and are only connected during photographic exposure. 
This arrangement affords a double advantage: 
1) All adjustments on the microscope and its appendages may be made by 
the observer with ease and precision while sitting directly before the microscope, 
whereas the usual fixed combination of the two parts implies a very inconvenient 
posture. 
2) The apparatus readily lends itself to the purposes of demonstration by 
projection. 
*) Which to the extent of the present edition we are ready to forward to 
applicants (price M. 3). 
