342 Neue Literatur. XXIV, 3. 



d. Beleuchtungs- und Heizapparate. 



Heimstädt, O., 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. Microsc. Soc. 



1907, pt. 3, p. 282). 

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



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

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



ultramicroscopici, 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. Microsc. 1907, pt. 3, p. 3G2; vgl. Engl. Mechan. vol. LXXXIV, 



1907, p. 59G; Journ. Quekett Microsc. Club vol. X, 1907, p. 77). 

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



1907, pt. .5, p. G29; vgl. Supplement zu Hauptkatalog Koristka No. 12, 



1907). 

 Microscopical observations at high temperatures: gas heat condenser and 



air-cooling apparatus (Journ. R. Microsc. Soc. 1907, pt. 5, p. G12-, vgl. 



Katalog von Zeiss 190G). 

 Sw^iFT s pan-aplanatic low power condenser (Journ. R. Microsc. Soc. 1907, 



pt. 3, p. 370; vgl. Swift and Sox's special Catalogue 190G, p. 50). 

 Zeiss' dark ground illumination bj' stopping-off in the Immersion condenser 



(Journ. R. Microsc. Soc. 1907, pt. 4, p. 485; vgl. Zeis.s' Katalog 



1907). 



e. Verschiedenes. 



(Baker, F. W. W.,) Determination of the properties of objectives (Journ. 



R. Microsc. Soc. 1907, pt. 5, p. 620-, vgl. Quekett Microsc. Club 1907). 

 Clerici, E., Sulla determinazione dell'indice di rifrazione al microscopio 



(Atti della R. Accad. dei Lincei vol. XVI, 1907, p. 33G). 

 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. Microsc. 



Soc. 1907, pt. 3, p. 2G5). 

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



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



