282 



SUMMARY OF CURRENT RESEARCHES RELATE^IG TO 



regulate at the same time the focal distance of the mirror and its 

 lateral distance from the axis of the Microscope." 



The condenser fits into a double cylindrical tube beneath the 

 stage, the inner tube being moved up or down in the outer by rack 

 and pinion. The diaphragms are also inserted in the inner tube. 



Fig. 31. 



The whole arrangement can be readily turned away from the axis on 

 an excentric pivot. 



The stand, in its general form, size (16 in. high), and workman- 

 ship, is one of the best that we have received from the Continent. 



[Since fig. 30 was cut, the Geneva Company have supplied us with 

 fig. 31, which shows more of the mode of attachment of the arms of 

 the mirror.] 



"Giant Electric Microscope."— This Microscope (ante, p. 109) 

 has continued to be the subject of somewhat ludicrous comments on 

 the part of the newspaper press. 



The one point of remark is the extent of the magnification 



