754 



SUMMARY OP CURRENT RESEARCHES RELATING TO 



pieoeend of amicroscope (fig. 17(5). The two brackets are each attached 

 to bellows, and are capable of an extrusion of about 80 in. The two 

 bracket* slide easily op and down the circular bar in a slot or key-way, 

 which prevents their taming ronnd. They are provided with clamp 

 screws to hold them rigidly at any position on the bar. 



The whole camera may be used in a vertical position over the 



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Fig. 176. 



Microscope, or in a horizontal position as shown by the outline in 

 fignre, in which case the extreme end stands upon two firm feet on the 

 table. 



A small table with three levelling screws is supplied upon which the 

 Microscope stands, and may be adjusted for centring the picture. 



The apparatus, which is made by the firm of R. and J. Beck, also 

 includes a one Opiate double plate-holder, carriers for ^-plates, and 

 light-tight connection for Microscope. 



