XXVII, 1. Neue Literatur. 189 



Zeiß, C, Ultramikroskopie und Dunkelfeldbeleuchtung-, Heft 8: Übersicht 

 über die Auswahl ultramikroskopischer Apparate. Jena 1910. 



b. Neue Mikroskope. 



Eleizegui , A. , Un nuevo modelo de microscopio para la enseiìanza (Bol. 



de la R. Soc. espaS. de Hist. Nat. voi. Vili, 1908, p. 442—444). 

 Watson's Naturalist Microscope (Journ. R. Microsc. Soc. 1910, pt. 2, p. 224; 



vgl. Watson and Sons' Special Catal.). 

 Zeiss' microscope for investigating ultra-microscopical particles (Journ. R. 



Microsc, Soc. 1910, pt. 1, p. 91; vgl. Zeiss' Katalog 3. Ausg. 1907, 



p. 15—19). 



c. Objektive. 



Watson's Ve and V12 Objectives (Journ. R. Microsc. Soc. 1910, pt. 2, p. 226; 

 vgl. Watson and Sons' Special Catal. 1910). 



d. Mikrometer. 



(Vies, F. ,) Ocular micrometer with interior vernier (Journ. R. Microsc. 

 Soc. 1910, pt. 2, p. 230; vgl. Compt. Rend. Soc. Biol. Paris t. LXVII, 

 1909, p. 537). 



e. Beleuchtungsapparate. 



(Barrett, W. T.,) New form of Polarimeter for the measurement of the 

 refractive index of opaque bodies (Journ. R. Microsc. Soc. 1910, pt. 1, 

 p. 93; vgl. Sci. Proc. Roy. Dublin Soc. vol. XII, 1909, p. 98). 



Goosman, Dark -ground illumination with ordinary microscope equipment 

 (Journ. of the Americ. med. Assoc, vol. LII, 1909, No. 20). 



(Harding, C. F.,) Use of the polariscope in testing high-tension insulators 

 (Journ. R. Microsc. Soc. 1910, pt. 1, p. 98; vgl. Proc. Indiana Acad. 

 Sci. 1908, p. 147—149). 



(S. C. A.,) Dark-ground illumination (Journ. R. Microsc. Soc. 1910, pt. 1, 

 p. 98; vgl. Engl. Mechanic vol. XC, 1909, p. 311). 



