190 Physiologie. — Microscopie. — Eumycetes. 



Ferner ist in kernlosen, chromatophoren- und folglich stärkereichen 

 Zellen der Gerbstofifgehalt geringer als in kernlosen, chromatopho- 

 ren- und folglich stärkearmen Zellen. Verf. folgert daraus, dass 

 zwischen dem Gerbstoff und anderen Inhaltsstoffen, wie Chromato- 

 phoren und Stärke, Korrelationen bestehen, wie solches schon 

 mehrfach festgestellt wurde. H. Klenke. 



Dadgeon, W., A method of handling material to be im- 

 bedded in paraffine. (Botanical Gazette. LVII. p. 70—72. 1914.) 



The paper discusses the usual methods of handling the mate 

 rials destined for microscopal researches and proposes some better 

 manner of washing and of bringing the objects through a series of 

 alcohols and xylols. The details may be read in original, but the 

 advantages of the writers method . may be mentioned here: is no 

 loss of time in handling large quantities of small light objects; 

 washing is easy and thorough; there is no danger of injury to the 

 most delicate material; no labeis, except those for identification, 

 are necessary on the separate batches of material; and the series 

 of alcohols and xylols may be used repeatedly, for while there is 

 continual weakening of each grade in the series, the weakening 

 is proportional throughout the w^hole series, so that their relation 

 to each other remains practicalU^ unchanged. 



M. J. Sirks (Haarlem). 



Chivers, A. H., A monograph of the genera Chaetoinium 

 and Ascotricha.-(^(tm. Torrey Bot. Cl. XIV. p. 155 — 240. pl. 6—17. 

 June 10. 1915.) 



Twenty-eight species of Chaetomiumj and two of Ascotricha are 

 differentiated. The following new names appear: Chaetomiuni trigo- 

 nosporum {BonimereUa trigonospora Marchai), C. circinatum, C. an- 

 giistatum and Ascotricha piisilla {Chaetoinium pusillum Elliot & Everh.). 



Trelease. 



Chivers, A. H., Preliminary diagnoses ofnew species of 

 Chaetomiiim. (Proc. Amer. Ac. Arts a. Sei. XLVIII. p. 83—88. 

 July 1912.) 



Chaetomium subspirale, C. sphaerale, C. quadrangulatum , C. 

 convolutmn, C. spinosiun, C. ampullarej C. aureum, C. fusiforine, 

 and C. trilaterale. Trelease. 



Melhus, J. E., Perennial mycelium in species oi Perono- 

 sporaceae related to Phvtophthora infestaris. (Journ. Agr. Res. 

 V. p. 59—70. pl. 3. Oct. 11." 1915.) 



Perennial mycelium is reported for several species belonging 

 to the genera Phytophthora^ Cystopus, Plasniopara and Peronospora. 



Trelease. 



Stakman, E. C. and Louise Jensen. Infection experiments 

 with Timothy rust. (Journ. Agr. Res. V. p. 211—216. Nov. 1. 

 1915.) 

 Piiccinia phleipratensis is found capable of inoculation on yiz.'ß-wa, 

 Hordeum, Seeale, Dactylis, Elymus, Loliutn and Brornus: some Va- 

 riation being noted when spores from the several hosts are com- 

 pared. Trelease. 



