256 Neue Literatur. VI, 2. 



(van Dyok, F. C), Binocular dissecting microscope (Journ. R. Microsc. Soc. 



1889 pt.2 p.275; cfr. Quees's Microsc. Bullet, vol. V, 1888, p.25). 

 Kayser, Einige an einem NoBEEx'schan Mikroskope vorgenommene Aende- 



rungen (Sehr, der Naturforsch. Gesellsch. Danzig. N. F. Bd. VII, H. 2, 



1889. — S.A. 8"). 

 klein, L., Ueber das von Dr. L. Klein construirte Excursionsmikroskop 



(Tagebl. d. 61. Vers. Deutscher Naturf. u. Aerzte zu Köln, 1889, p. 41; 



cfr. diese Zeitschr. Bd. V, 1888, p. 196). 

 Piersol, G. A., Continental microscopes (Qceex's Microsc. Bull. vol. V. 1888. 



p. 23). 

 Ahrens' giant microscope (Journ R. Microsc. Soc. 1889 pt. 2 p. 273). 

 Crouch's petrological microscope (Journ. R. Microsc. Soc. 1889 p. 1 p. 113). 

 CzAPSKi's ear-(tymi)anum-)microscope (Journ. R. Microsc. Soc. 1889 pt. 1 p. 112; 



cfr. diese Zeitschr. Bd. V, 1888, p. 325). 

 Duo DE Chaulnes' microscope (Journ. R. Microsc. Soc. 1889 pt. 1 p. 118). 

 Fasoldt's patent microscope (Journ. R. Microsc. Soc. 1889 pt. 1 p. 109). 

 Hughes' patent oxyhydrogen microscope (Journ. R. Microsc. Soc. 1889 pt. 1 



p. 115). 

 Leitz large dissecting microscope (Journ. R. Microsc. Soc. 1889 pt. 2 p. 275), 

 Pfeffee's botanical microscope (Journ. R. Microsc. Soc. 1889 pt. 2 p. 272). 

 Reichert's petrological microscope (Journ. R. Microsc. Soc. 1889 pt. 1 p. 113). 

 Swift's mineral microscope (Journ. R. Microsc. Soc. 1889 pt. 2 p. 274). 



b. Objectiv. 



Ewell, M. D., American pbjectives and Dr. Zeiss apochromatic objectives (The 



Microscope vol. IX, 1889, p. 30). 

 Kayser, Ueber Apertometer (Sehr. d. Naturforsch. Gesellsch. Danzig. N. F. 



Bd. VII, H. 2, 1889. — SA. 8'^). 

 Penny, R. G., Microscope objectives. Angular aperture (Engl. Mechan. 



vol. XL VIII, 1888, p. 316). 

 Monobromide of naphthaline as an Immersion medium (Journ. R. Microsc. Soc. 



1889 pt. 1 p. 119). 



c. Stativ. 



Adjustable safety-stage (Journ. R. Microsc. Soc. 1889 pt. 1 p. 121). 

 Falter's rotating object-holder (Journ. R. Microsc. Soc. 1889 pt. 1 p. 276). 

 Finder (Journ. R. Microsc. Soc. 1889 pt. 1 p. 121 ; cfr. diese Zeitschr. Bd. V, 



1888, p. 39). 

 Hughes' improved microscopic attachment. Cheap form (Journ. R. Microsc. Soc. 



1889 pt. 1 p. 116). 



