498 Neue Literatur. XX, 4. 



Trotzewitsch , S. E., Anfertigung von Objectiven für Teleskope, Mikro- 

 skope und pkotographische Apparate. Die optische Technik der Mikro- 

 skope und Teleskope [Russisch]. Warschau 1903. 322 pp. 



Ein neuer Präcisionsapparat zur Prüfung von Linsen und photographischen 

 Objectiven [Mitth. a. d. k. k. geogr. Lehr- u. Versuchsanstalt Wien] 

 (Photogr. Correspondenz 1903). 



d. Mikrometer. 



(Boley, P. ,) Very powerful niicrornetric microscope (Journ. R. Microsc. 



Soc. 1903 , pt. 6 , p. 761 ; vgl. Bull, de la Soc. scientif. et rnedic. de 



l'Ouest t. XI, 1902, p. 381). 

 Nelson, E. M. , A microscopic correction for minute objects (Journ. R. 



Microsc. Soc. 1903, pt. 5, p. 579). 

 Tubetjf's drawing apparatus (Journ. R. Microsc. Soc. 1903, pt. 6, p. 763). 



e. Beleuchtungsapparate. 



(Curties, C. L.,) Monochromatic light apparatus (Journ. R. Microsc. Soc. 



1903, pt. 5, p. 674). 

 (Dowdy, S. E.,) Colour illuinination of microscopic objects (Journ. R. 



Microsc. Soc. 1903, p. 5, p. 671; vgl. English Median, vol. LXXVII, 



1903, p. 324). 

 (Rheinberg, J.,) Wide illuminating cones (Journ. R. Microsc. Soc. 1903, 



pt. 5, p. 673; vgl. English Median, vol. LXXVI, 1903, p. 463). 

 Fuess' hemispherical gypsum and metal reflectors (Journ. R. Microsc. Soc. 



1903, pt. 6, p. 763). 



Sammellinse mit Irisblende von Carl Zeiss (Deutsche Mechaniker-Zeitg. 



1904, No. 3, p. 28). 



f. Zeichenapparate. 



Koristka's Abbe camera lucida with lens-holder (Journ. R. Microsc. Soc. 

 1903, pt. 4, p. 554). 



