IV, 4. Neue Literatur. 547 



Hartnack's cupro-ammonia cell (Journ. R. Microsc. Soc. 1887 pt. 5 p. 826 ; cfr. 



Journ. de Microgr. t. IX, 1885, p. 36(i). 

 Rochester inagic lantern and projection microscopo (Journ. R. Microsc. Soc. 



1887 pt. 5 p. 804). 



e. Mikrometer. 



Ward, R. H., Micrometer wires (Proceed. Amer. Soc. Microscopists 9th. ann. 



Meet 1886, p. 89). 

 Rogers' stage micrometer (Journ. New York Microsc. Soc. vol. III, 1887, p. 40). 



f. Polarisationsapparate. 



Lighton's analyzing diaphragm for the polariscope (Journ. R. Microsc. Soc. 



1887 pt. 5 p. 812; cfr. Amer. Monthly Microsc. Journ. vol. VIII, 1887, 



p. 109; cfr. diese Zeitschr. Bd. IV, 1887, p. 476). 

 Single polariscope for the Toy microscope (Proceed. Amer. Soc. Microscopists 



9»'. ann. Meet. 1886, p. 190). 



g. Spectralapparate. 



(Braun, C), Verbessertes Prisma ä vision directe (Zeitschr. f. Instrumentenk. 

 Bd. VII, 1887. H. 11, p. 399; cfr. Ber. d. Erzbiscliöfl. HAYXALD'schen Ob- 

 servat. zu Kalocza in Ungarn). 



li. Camera lucida. 



Nachet's camera lucida for magnifiers (Journ. R. Microsc. Soc. 1887 pt. 4 



p. 649). 

 Prism for drawing (Journ. R. Microsc. Soc. 1887 pt. 5 p. 650). 

 ScHROEDEß's new Lieberkühns (Journ. Quekett Microsc. Clul) vol. III, 1887, 



p. 92). 



i. Varia. 



Brockmann, H., Beiträge zur Dioptrik centrirter sphärischer Flächen (lu- 

 auguraldiss. Rostock 1887). 



Czai)ski, S. , Neuere Sphärometer zur Messung der Krümmung von Linsen- 

 flächen (Zeitschr. f. Instrumentenk. Bd. VII, 1887, H. 9, p. 297). 



Errera, L., La micrographie ä l'exposition de Wiesbade (Bull. Soc. Beige de 

 Microsc. t. XIV, 1887, no. 1 p. 22). 



Hanks, H., Errors likely to occur in microscopical Observation (Rep. and 

 Proceed. S. Francisco Microsc. Soc July 1887). 



Hodgkinson, A,, On the diffraction of microscopic objects in relation to the 



35* 



