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). 

 (Älacloskie, 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 dififi-action 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). 

 (Thomj)Son, 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 microscope of the seventeenth Century (Procoed. 



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. 



Eabre-Domergne, La microphotographie et les agrandissements positifs directs 



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

 Frnncotte, P., Focusing in photomicrograpliy (Journ. 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). 

 VAX Heurck's vertical camera for photomicrography (Journ. R. Microsc. Soc. 



1892 pt. 2 p. 271). 



4. Mikroskopisches Präparat. 



a. Apparate zum Präpariren. 



(Chauveaud, 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). 



