XX, 4. Neue Literatur. 497 



Beck's portable Continental model (Joum. R. Microsc. Soc. 1903, pt. 4, 



p. 544). 

 Leitz' mineralogical stand, 110. 1 (Journ. R. Microsc. Soc. 1903, pt. 6, 



p. 758). 

 Leitz' mineralogical stand, no. 2 (Journ. R. Microsc. Soc. 1903, pt. 6, 



p. 758). 

 Leitz' new stand and fine adjusteinent (Journ. Microsc. Soc. 1903, pt. 5, 



p. 665). 

 New double-hinged linib-holder (Journ. R. Microsc. Soc. 1903, pt. 4, p. 545). 

 New portable raicroscope (Journ. R. Microsc. Soc. 1903, pt. 4, p. 543). 

 Watson's new Pattern portable microscope (Journ. R. Microsc. Soc. 1903, 



pt. 5, p. 670). 



b. Objecttisch. 



(Kraus, R.,) New regulating arrangeinent for a bot stage (Journ. R. 



Microsc. Soc. 1903, pt. 5, p. 669; vgl. ibid. 1886, p. 1052). 

 Nelson, E. M., An hnproved borseshoe stage (Journ. R. Microsc. Soc. 



1903, pt. 5, p. 591). 

 Koristka's mechanical stage (Journ. R. Microsc. Soc. 1903, pt. 3, p. 547). 

 Watson's new scop mechanical stage (Journ. R. Microsc. Soc. 1903, pt. 5, 



p. 669). 

 Watson's „Argus" attachable mechanical stage (Journ. R. Microsc. Soc. 



1903, pt. 6, p. 761). 



c. Objectiv. 



Conrady, A. E., On the chromatic correction of object-glasses (Monthly 



Not. Roy. Astron. Soc. vol. LXIV, 1904, p. 182). 

 Eberhard, G., Ueber den schädlichen Einfluss des Verkittens von Objec- 



tiven (Zeitschr. f. Instrumentenk. Bd. XXIII, 1903, p. 274). 

 (Eberhard, G.,) The injurions effect of cement upon objectives (Journ. R. 



Microsc. Soc. 1904, pt. 6, p. 762; vgl. Zeitschr. f. Instrumentenk. 



Bd. XXIII, 1903, p. 274). 

 Hartmann, J. , Objectivuntersuchungen (Zeitschr. f. Instrumentenk. Bd. 



XXIV, 1904, p. 1). 

 Kerber, A., Ueber den Astigmatismus von Fernrohr- und Mikroskop- 



objectiven (Mechaniker Bd. XI, 1903, p. 157). 

 (Schmidt, H. ,) Graphic representation of the correction distance of au 



objective (Journ. R. Microsc. Soc. 1903, pt. 6, p. 762; vgl. Centralzeitg. 



f. Opt. u. Mechan. Bd. XXIV, 1903, p. 73). 



Zeitschr. f. viss. Mikroskopie. XX. 4. 32 



