502 



SUMMARY OF CURRENT RESEARCHES RELATING TO 



the lamp by a sliding nut. The legs at their base form a square of 

 16 in,, thus allowing room for a large image, which can be better 

 seen if a piece of black cloth is thrown round three of the sides. 



Fig. 87. 



PlossVs Electric Projection Microscope* — Dr. G. Gartner de- 

 scribes the Microscope made by Plossl and Co., which is used for 

 demonstration purposes at the Institute of General and Experimental 

 Pathology in Vienna by Prof. Strieker. 



The source of light is an electric arc lamp, supplied by a dynamo 

 driven by a 6 horse-power gas engine. The maximum illuminating 

 power amounts to 2500 candles. An assistant regulates it by hand, 



* Med. JaLrb. K.K. Gesell. Aerzte Wien, 1884, pp. 217-44 (1 pi. and 1 fig.). 



