534 SUMMARY OF CURRENT RESEA.ROIIES RELATING TO 



Tyrrell, P.— Concerning Angles. 



[St;ituimnt of hi.s experience as to the superiority, " for histological work 

 or anything else," of wido-angleil homogoneous-itnmersiou objectives over 

 watcr-iuimersiou.] 



Amcr. Mon. Micr. Journ., VI. (1885) p. 80. 

 Van Brunt, C. — Presidential Address. 



[Iniprovemeuts m;i<le in the Microscope — Protoplasm, Schizomy cotes, &c.]. 

 Journ. New York Micr. jSoc, I. (1885) pp. 53-9. 

 VoRCK, C. M. — Lantern transparencies. [Pys<.] 



Ainer. Mon. Micr. Journ., VI. (1885) pp. 84-5. 

 W ALES. — Observations on resolution of Amphipleura pcUuciJa. {^Post.} 



Juurn. Nciv York Micr. Soc., I. (1885) p. 103. 

 White, T. C. — The Eetina of Science. 



P/iofogr. Ncirs, XXIX. (1885) pp. 179-80 (2 figs.). 

 Winter, W. — TJeher die Darstellung Naturwissenschaftlicher Objekte. (On 

 representing Natural History objects. ) \_/'vst.'] 



Bcr. Scnckni'wr;!. Nuturf. GcsclL, 1881, pp. 75-7. 

 ZiMMERMANN, O. E. K. — Atlas der Pflanzen-Krankheiten -welche dnrch Pilze 

 hervorgerufen warden. Mikrophotographische Lichtdruckabbildungen der 

 phytopathogenen Pilze nebst erlauterndem Texte. (Atlas of pliuit-discases 

 produced by fungi. Photo-iuicrograpbic illustrations of the phytopathogenic 

 fungi, with explanatory text.) Part I. 



IG pp. and 2 pis. of 15 tigs. each. Text 8vo, Atlas fob, Ilaile a. S., 1885. 



/3. Collecting', Mounting and Examining Objects, &c. 



Collecting RMzopods.* — Prof. H. Blanc describes a mctliod of ob- 

 taining material from the deep water of the Lake of Geneva by lower- 

 ing to the bottom a large St. Andrew's cross, to the four extremities of 

 which are attached pieces of very thick glass. After three or four 

 weeks this is raised to the surface again and the fine mud that has 

 collected on the pieces of glass removed with a brush. 



Cultivation of Actinomyces.! — Dr. 0. Israel found great 

 difficulty in cultivating Actinomyces from the slow growth of the 

 fungus, as it was crowded out by the gi'owth of other organisms. No 

 result followed attempts at cultivation on fluid nutrient media — 

 beef-bouillon, meat-extract, peptone-solutions, fluid bullock's blood- 

 serum at the temperature of the room and body, or peptone-salt- 

 gelatine-meat solution at 20' C. Only Koch's coagulated bullock's 

 blood-serum proved a suitable nutrient soil, in which it grew very 

 slowly. 



The growth appeared as a very thin, velvety, dry looking clump 

 on the bright surface of the coagulum, in which (not for 14 days) 

 small nodules appeared. Cultivation of eight weeks' growth hardly 

 extended more than 1/2 cm. on cither side of the point of inoculation. 

 Microscopically the vegetations in the culture corresponded with 

 those which exist in the animal body. With low powers the margin 

 showed a serpiginous border. 



Cultivation Methods for the Investigation of Fungi.J — Dr. O. 

 Brefeld observes that a substratum on which the fungus exists in 



* Bull. Soc. Vaudoisc Sci. Nat., xx. (1885) pp. 287-8. 

 t Yiichow's Arch. f. Pathol. Anat. u. Physiol., xcv. (1884) p. HO. 

 X Brefeld, O., ' Potauische Untersuchuugen liber SchiiumelpiJze,' part iv. 

 pp. 1-35. 4to, Leipzig, 1883. 



