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SUMMARY OF CURRENT RESEARCHES RELATING TO 



issuing from the water-cooler impinge upon the stage (40 X 40 cm.) 

 and the object thereon. If it should be desired to make the illuminated 

 area on the stage smaller and brighter, an additional condenser K 2 can 



be pushed into the dotted position so as to parallelise the rays. Small 

 adjustments of the two lamps are effected by the handwheel R 2 . The 

 rays reflected from the stage pass through the objective 15 and, after 



