1900] MICROSCOPICAL JOURNAL. 169 



Chroraatophores and "Central Korper" nuclei. In Oscil- 

 laria he was able to observe that the colorless central body 

 is surrounded by a colored protoplasm, but it is by no 

 means demonstrated that chromatophores such as occur 

 in higher plants are found in Cyanophyceae. In his recent 

 studies he was able to make out fine granulationsin cells 

 of Lyngbya, Oscillaria and Nostoc, The substance of the 

 central body is not homogeneous as a rule, in Nostoc how- 

 ever it is homogeneous. In Gloiotrichia pisura a homoge- 

 neous central body produces ridges which project into the 

 colorless plasma. (Uber die Cyanophyceen Abh. Gebi«te. 

 d. Naturw. 16 : Separate.) 



Anatomical Atlas. — The fifteenth Lieferung of the 

 Tschirch and Oesterle Anatomischer Atlas is up to the 

 usual standard in the excellent accounts and plateg of the 

 drugs considered. This part deals with the genera] as 

 well as the minute structural details of Flor. malvae, Fol. 

 malvsB, Fol. althsBSB, Rad. gentianse, Anthodise cinae, Ar- 

 temisia cina), Fol. digitalis, Sera fsBnugrteci. This work 

 is an invaluable guide in pharmaceutical laboratories 

 where microscopical details of seeds or other parts of 

 drugs are studied. 



Plant Diseases. — Dr. M. Hollrung is the editor of the 

 year b©ok pertaining to plant diseases and their protec- 

 tion. The first year 1898 treats fully the fungus enemies 

 of cultivated plants. The editor desires that authors send 

 their papers on phytopathology to him at Halle, Germany 

 so that they may be abstracted. 



Ropy Milk. — Archibold R. Ward gives an account of 

 ropy milk (Bacillus lactis viicosus) which has a viscid cap- 

 sule. The capsule does not stain when treated with com- 

 mon methods, but by extracting the fat with ether and 

 staining with carbol fuchsine the capsule is shown espec- 

 ially well as an unstained area surrounding the individual. 

 The capsule can be positively demonstrated by Welch's 

 glacial acetic acid method and by the Gram method. The 



