342 Neue Literatur. XXIV, 3. 



<l. Beleuchtung«- und Heizapparate. 



Heimstädt, ()., Spiegelkondensor für ultramikroskopische Beobachtungen 



(Zeitschr. f. Chemie u. Industrie d. Kolloide Bd. I, 1907, H. 9). 

 Nelson, C. M. , An improved vertical Illuminator (Journ. R. Mierosc. Soc. 



L907, pt. .'!, p. 282). 

 Reichert, K. jr., Gebrauchsanweisung zum Spiegelkondensor (Zeitschr. f. 



angew. Mikrosk. Bd. XIII, 1907, II. 5). 

 Reichert, C, Nuovo condensatore a specchio per la visione in elementi 



ultramieroscopici. 6 figg. (Lo Sperimentale = Arch. di Biol. norm, e 



patol., Anno LXI, fasc. 4, p. 407—414). 

 Siede, W., Ein neuer Apparat zur Sichtbarmachung ultramikroskopischer 



Teilchen (Zeitschr. f. angew. Mikrosk. Bd. XIII, 1907, H. 4, p. 79). 

 (Traviss, W. R. ,) Expanding spot for dark ground illumination (Journ. 



R. Mierosc. 1907, pt. 3, p. 362; vgl. Engl. Median, vol. LXXXIY, 



1907, p. 596; Journ. Quekett Mierosc. Club vol. X, 1907, p. 77). 

 Koristka's achromatic oil-immersion condenser (Journ. R. Mierosc. Soc. 



19()7, pt. 5, p. 629; vgl. Supplement zu Hauptkatalog Koristka No. 12, 



1907). 

 Microscopical observations at high temperatures: gas heat condenser and 



air-cooling apparatus (Journ. R. Mierosc. Soc. 1907, pt. 5, p. 612; vgl. 



Katalog von Zeiss 1906). 

 Swipt's pan-aplanatic low power condenser (Journ. R. Mierosc. Soc. 1907, 



pt. 3, p. 370; vgl. Swift and Son's special Catalogue 1906, p. 50). 

 Zeiss' dark ground illumination by stopping-off in the immersion condenser 



(Journ. R. Mierosc. Soc. 1907 , pt. 4 , p. 485 ; vgl. Zeiss' Katalog 



1907). 



e. Verschiedenes. 



(Baker, F. "SV. W.,) Determination of the properties of objeetives (Journ. 



R. Mierosc. Soc. 1907, pt. 5, p. 620; vgl. Quekett Mierosc. Club 1907). 

 Clerici , E. , Sulla determinazione den" indice di rifrazione al microscopio 



(Atti della R. Accad. dei Lincei vol. XVI, 1907, p. 336). 

 Cox , A. J. , A new comparator (Philipp. Journ. of Sei. vol. II, 1907, 



p. 139—142). 

 Gordon, J. W. , An early criticism of the Abbe theory (Journ. R. Mierosc. 



Soc. 1907, pt. 3, p. 265). 

 (Lomb, H. C.,) Measurement of highly curved lenses with the Abbe 



Spherometer (Journ. R. Mierosc. Soc. 1906, pt. 4, p. 483; vgl. Deutsche 



Mechan.-Zeitg. 1907, p. 15). 

 Nelson , E. M. , An astronomical eye-piece used as a simple microscope 



(Journ. R. Mierosc. Soc. 1907, pt. 3, p. 284). 



