VIII, 2. Neue Literatur. 267 



Worraley, T. G., Concordant micrometric measurements (Universal Med. 



Mag." vol. III, 1890, p. 101). 

 Bulloch's improved filar micrometer (Journ. R. Microsc. Soc. 1891 pt. 1 p. 106). 



g, Polarisationsapparate. 



Brunnee, R., Ueber eine neue Vorrichtung für Mikroskope zum Zwecke eines 



schnellen Uebergangs von parallelem polarisirten zu convergontem Licht 



(Zeitschr. f. Instrumentenk. Bd. XI, 1891, H. 4 p. 136). 

 (Grosse, AV.), Polarizing prisms (Journ. R. Microsc. Soc. 1891 pt. 2 p. 253; 



cfr. Zeitschr. f. Instrumentenk. Bd. X, 1890, p. 445). 

 (Wülflng, E. A.), Apparatus for the rapid change from parallel to convergent 



polarized light in connection with the microscope (Journ. R. Microsc. Soc. 



1891 pt. 1 p. 105; cfr. Neues Jahrb. f. Mineral. 1889 Bd. II p. 199; diese 



Zeitschr. Bd. VI, 1889, p. 545). 



h. Camera lucida. 



(Govi, G.), A new camera lucida (Journ. R. Microsc. Soc. 1891 pt. 2 p. 254; 

 cfr. Centralzeitg. f. Opt. u. Mechan. Bd. X, 1889, No. 22 p. 260; diese 

 Zeitschr. Bd. VI, 1889, p. 481). 



1. Testobjecte. 



Cox, D. , Diatom structure (Journ. New York Microsc. Soc. vol. VII, 1891, 



no. 2 p. 73). 

 Smith, Th., Structure of the Pleurosigma (Journ. New York Microsc. Soc. 



vol. VII, 1891, no. 2 p. 61). 



k. Verschiedenes. 



(Bausch, E.)j The füll utilization of the capacity of the microscope, and 



means for obtaining the same (Journ. R. Microsc. Soc. 1891 pt. 1 p. 108 ; 



cfr. The Microscope vol. X, 1890, p. 289). 

 Diidley, H. , The work of the microscope (Journ. New York Microsc. Soc. 



vol.Vn, 1891, no.2 p. 87). 

 (Govi, G.), New method for constructing and calculating the place, position, 



and size of Images formed by lenses or Compound optical Systems (Journ. 



R. Microsc. Soc. 1891 pt. 1 p. 122; cfr. Rendiconti R. Accad. dei IJncei 



Roma 1888, p.655). 

 (Hanks, H. G.), Ancient lenses (Journ. R. Microsc. Soc. 1891 pt. 2 p. 251 ; 



cfr. Amer. Monthly Microsc. Journ. vol. XI, 1890, p. 243). 

 (Landsberg, C), On the history of the invention of spectacles, microscope, 



and telescope (Journ. R. Microsc. Soc. 1891 pt.2 p. 269; cfr. Centralzeitg. 



f. Opt. u. Mechan. Bd. XI, 1890, p. 265, 277). 



