456 Neue Literatur. III, 3. 



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Microsc. Soc. Scr. II vol. VI, 1886, pt. 3 p. 511). 

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vol. VI, 1886, pt. 4 p. 676; cfr. Centralzeitg. f. Opt. u. Mechan. Bd. VI, 



1885, p. 270). 



