276 Neue Literatur. IX. 2. 



(James, H. G.,) Microscope tube-length and resolving power (Journ. R. 



Microsc.Soc. 1892 pt. 2 p. 272; cfr. Engl. Mechan. vol. LIV, 1892, p. 489). 

 (3Iaclüskie, G.,) The dioptrical principles of tlie microscope (Journ. R. Microsc. 



Soc. 1892 pt. 1 p. 135; cfr. The Microscope vol. XI, 1891, p. 209). 

 Nelson, E. M., The present position of the difiraction theory of microscopic 



Version (Journ. Queckett Microsc. Club Ser. II, vol. IV, 1892, no. 30 p. 381). 

 Nelson, E. M., Virtual Images and initial magnifying power (Journ. R, Microsc. 



Soc. 1892 pt. 2 p. 180). 

 (Tliompson, S. P.,) Ueber den Gebrauch von Flussspath in optischen Instru- 

 menten (Zeitschr. f. Instrumentenk. Bd. XII, 1892, H. 3 p. 106; cfr. Philos_ 



Mag. vol. V, no. 31, 1891, p. 121). 

 Thompson, S. P., Ueber die Messung von Linsen (Centralzeitg. f. Opt. u. 



Mechan. Bd. XIII, 1892, No. 4 p. 33; No. 5 p. 45; No. 6 p. 57; cfr. Journ. 



R. Microsc. Soc. 1892 pt. 1 p. 109). 

 West, Ch. E., The binocular mici'oscope of the seventeenth Century (Proceed. 



Amer. Soc. Microscopists vol. XII, 1891, p. 59; cfr. Journ. R. Microsc. Soc. 



1892 pt. 1 p. 98). 

 Exhibition of microscopes at Antwerp in 1891 (Journ. R. Microsc. Soc. 1892 



pt. 2 p. 273; cfr. Ann. de Microgr. t. IV, 1891, p. 22, 69, 120, 199). 



3. Mikrophotographie. 



Fabre-Domerg-ue, La microphotographie et les agrandissements positifs directs 



(Ann. de Microgr. t. IV, no. 6, 1892, p. 288). 

 Fruueotte, P., Focusing in photomicrography (Joiu-n. R. Microsc. Soc. 1892 



pt. 2 p. 270). 

 (Pringle, A.,) Photomicrography (Journ. R. Micros. Soc. 1892 pt. 2 p. 269; 



cfr. Journ. and Transact. of the Photogr. Soc. vol. XVI, 1891, p. 71). 

 Photomicrography (Journ. R. Microsc. Soc. 1892 pt. 1 p. 108 ; cfr. Centralzeitg. 



f. Opt. u. Mechan. Bd. XII, 1891, p. 262). 

 VAN Heueck's vertical camera for photomicrography (Jouni. R. Microsc. Soc. 



1892 pt. 2 p. 271). 



4. Mikroskopisches Präparat. 



a, Ai)parate zum Präpariren. 



(Chaiiveaud, L. G.,) Microplyne and microzete (Journ. R. Microsc. Soc. 1892 



pt. 1 p. 155; cfr. Ann. des sc. nat. Botanique vol. XIV, 1891, p. 16; diese 



Zeitschr. Bd. VIII, 1891, p. 413). 

 (Drosten,) Glass slide boxes (Journ. R. Microsc. Soc. 1892 pt. 1 p. 107 ; cfr. 



Bull. Soc. Beige de Microsc. t. XVIII, 1891, p. 5). 

 (Gabritscliewsky, G.,) Graduated capillary pipette for measuring very small 



quantities of fluid (Journ. R. Microsc. Soc. 1892 pt. 1 p. 152; cfr. Centralbl. 



f. Bacteriol. u. Parasitenk. Bd. X, 1891, p. 248; diese Zeitschr. Bd. VIII, 



1891, p. 521). 



