XX, 4. Neue Literatur. 497 



Beck's portable Continental mudel (Journ. R. Microsc. 80c. 1903, pt. 4, 



p. 544). 

 Leitz' mineralogical stand , no. 1 (Journ. R. Microsc. Soc. 19(J3, pt. 6, 



p. 758). 

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



p. 758). 

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



p. 665). 

 New double-hinged limb-holder (Journ. R. i\[icrosc. Soc. 1903, pt. 4, p. 545). 

 New portable microscope (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 arrangement for a bot stage (Journ. R. 



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

 Nelson, E. M., An improved horseshoe 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. Objeetiv. 



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- 



ubjectiven (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. wiss. Mikroskopie. XX. 4. 32 



