ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 



463 



Ive?, P. E. — Eine photomikrographische Vorrichtung. 



Zeitschr. Opt. u. Mech., xxiv. (1903) p. 3. 

 ,. „ Stereoscopic Photomicrography with high powers. 



[The apparatus used seems to be much the same as that figured in Journal 

 K.M.S., 1903, p. 224. The lenses, etc., were a Zeiss 3 mm. apochromat ; 

 18 compensating eye-piece ; amplification, 1700 ; Welsbach light; Cramer 

 isochromatic plates without colour-screeu. The objects were Pleurosigma 

 angulatum, Coscinodiscus aslerocephalus, and a Triceratium. 



Trans. Amer. Micr. Soc.,x\iv. (1902) pp. 23-7 (1 pi.). 

 Molesch, H. — Bacterienlicht und photographische Platte. 



Anz. d. h. k. Acad. d. Wiss., Wien, 1903, p. 50. 



(5) Microscopical Optics and Manipulation. 



Jamin's Circle for Reflexion, Refraction and Polarisation.*— 

 This instrument (fig. 70) is adapted for repeating the experiments on 



Fig 70. 



the above branches of Optics as described in the Cows de riujsiuuc de 

 Jamin, 



* Catalogue of the Socie'te Ge'ncvoise, 1900, p. 112, No. 2870. 



