ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 



369 



The Microscope itself is of large size, and is equally fit for the exami- 

 nation of brain sections or of small objects. It has a glass stage 

 10 cm. by 10 cm., which may be replaced by an accompanying metal 

 plate. The base is a heavy horseshoe : the hand-rests are mahogany 

 and of large size. The lens-carriers have both horizontal and vertical 



Fig. 62. 



adjustments, and there is provision for a second carrier of weak 

 magnification. There is a sub-stage arrangement for reducing the light 

 at pleasure ; the mirrors are plane and concave, and can be placed so as 

 to illuminate from above. 



New Method of using the Plankton Searcher.* — P. Mayer has 

 found a simple means for obviating the difficulties attendant on the use 

 of the Plankton Searcher.f These difficulties, more or less attendant 

 •on the great working distance, have been got over by means of a glass 



* Zeitschr. wiss. Mikrosk., xxi. (1901) pp. 447-9 (2 fijrs). 

 t See this Journal, 1898, pp. 677-8 ; 1899, pp. 111-12. 



June 21st, 1005 2 c 



