ZOOLOGY AND BOTAN'Y, MICROSCOPY, ETC. 



103 



i(3) Illuminating and other Apparatus. 



Seibert's New Projection Microscope with Electric Light.*— The 

 light-source of this instrument (fig. 24) is obtained from a Schuckert's 

 arc lamp of 16 ampere, triple, large illuminating system (16 cm. dia- 

 meter). A water-cooling chamber is placed between the plano-convex 



Q_M^ 



w 



6 



* Seibert's Catalogue. No. 1?, p- '3. 



