X, 3. Neue Literatur. 423 



Nelson, E. M., Improved projection microscope (Journ. Quekett Microsc. Club 



ser. 2 vol. V, no. 32 p. 228). 

 Reichert hand-microscope (Journ. R. Microsc. Soc. 1893 pt. 3 p. 381). 

 Reichert microscope (Journ. R. Microsc. Soc. 1893 pt. 3 p. 380). 



b. Objectiv. 



Ebner, V. v., Zur Doppelbrechung der Objective (Internat. Monatsschr. f. 

 Anat. u. Physiol. Bd. X, 1893 H. 3). 



c. Tisch. 



Reichert movable object-stage (Journ. R. Microsc. Soc. 1893 pt. 3 p. 383). 



d. Beleuchtungsapparat. 



Reichert's illuminating apparatus (Journ. R. Microsc. Soc. 1893 pt. 3 p. 381). 



e. Verschiedenes. 



(Asche, A.,) Determination of optical tube-length (Journ. R. Microsc. Soc. 



1893 pt. 3 p. 389; cfr. Journ. Quekett Microsc. Club vol. V, 1893, p. 152). 

 de Boeck, J., Procede de tecbnique microscopique applique ä la me'sure des 



faibles differences de temperature (Bull. Soc. Beige de Microsc. t. XIX, 



1893, no. 5 p. 85). 

 Ingpen, J. E., Note on Wenhaji's method for obtaining an oblique view of 



a microscopical object and on Marshall's zoophyte trough (Joiu-n. Quekett '* 



Microsc. Club vol. V, no. 32 p. 223). 

 (Izarn,) Photography of gratings and micrometers engraved on glass (Journ. 



R. Microsc. Soc. 1893 pt. 3 p. 387 ; cfr. Comptes Rend. de l'Acad. des Sc. 



Paris t. CXVI, 1893, p. 506; diese Zeitschr. Bd. X, 1893, p. 220). 

 Nelson, E. M., Fraunhofer applies bis own diffraction theorem to the micro- 

 scope (Journ. Quekett Microsc. Club ser. 2 vol. V, no. 32 p. 232). 

 Nelson, E. M., Note on a new spherometer (Journ. Quekett Microsc. Club 



ser. 2 vol. V, no. 32 p. 225). 

 (Salomons, S.,) Optical projection (Journ. R. Microsc. Soc. 1893 pt. 3 p. 383; 



cfr. Proceed. of the Royal Inst. vol. XIII, 1893, p. 534). 

 Schroeder, H., Ueber die Herstellung genauer Mikrometerschrauben und 



über die Mikrometereinrichtung meiner Spiegelfühlhebel (Zeitschr. f. In- 



strumentenk. Bd. XIII, 1893, H. 6 p. 217). 

 Sohnke, L., Ungewöhnliche mikroskopische Bilder (Sitzber. d. mathem.-phys. 



Cl. d. k. Bayer. Acad. d. Wiss. Bd. XXIII, 1893, H. 2 p. 223). 



