Physiologie. — Eumycetes. 539 



evaporating surfaces are exposed in organisms. An account is given 

 of the standardization of the porous cap atmometer, for getting a 

 coefücient of correction by which to multiply the reading of any 

 cup in Order to obtain the reading which would have been obtained 

 had a Standard cup been used in place of the cup in question. The 

 Installation of the Instrument is described, both with absorbing 

 mounting and with non-absorbing mounting, which prevents absorp- 

 tion of rain — an obvious advantage in outdoor studies. Under the 

 heading of the Operation of the porous cup atmometer are discussed 

 cleanliness, re-standardization, renovation, records and correction of 

 readings, and the interpretation of atmometer readings. In connection 

 with the last named subject, the author states that "In so far as the 

 surface exposed by the Instrument is like that exposed by plants. 

 and in so far as the exposure is the same in the two cases, the 

 readings are indices of the power of the air to remove water from 

 unchanging plant surfaces". In concluding the series. an account is 

 given of the radio atmometer, with a dark porous cup, which in 

 connection with the ordinary white instrument, is used for measuring 

 the effectiveness of the sun's rays in promoting evaporation. This 

 instrument, according to the author, is particularlyuseful in study ing 

 plant transpiration, where the absorption of radiant energj'^ is 

 frequently more important than atmospheric evaporating power 

 itself. The author states that white spherical porous cups are now 

 available, and that it is of prime importance for the development 

 of radio-atmometry to obtain similar permanent black spheres, be- 

 cause these should present (without change of position) the same 

 angle of incidence of the sun's rays at all times of the day and 

 year, Sam F. Trelease. 



Klöcker, A., Chronologische Zusammenstellung der Ar- 

 beiten über Saccharotnyces apiculatus von 1870 bis 1912. 

 (Cbl. Bakt. 2. Abt. XLIII. p. 369—419. 1915.) 



Bericht über 271 sich mit Saccharomyces apiculatus beschäfti- 

 gende Arbeiten. Bei einer jeden wird der Inhalt kritisch beleuchtet. 

 Zum Schluss sind die Arbeiten, dem Inhalte nach geordnet, zusam- 

 mengestellt und zwar in der Weise, dass man mühelos erkennt, in 

 welchen Arbeiten Angaben über Systematik, Gestalt und Grösse 

 der Zellen, Sprossung, Generationsdauer, Sporenbildung, Zellinhalt, 

 (Vakuole, Kerne, Gerbsäure, Glykogen), Verhalten zu den Zucker- 

 arten, Säure- und Aetherbilding, Assimilation, Proteolyse, Einwir- 

 kung von und auf Chemikalien, von Temperatur und Licht, Ein- 

 trocknen, Pathogenität, Verhalten in verschiedenen Nährsubstraten, 

 Aufbewahrung, Varietäten oder Rassen , Auftreten in der Weingärung 

 und anderswo, Kreislauf, Anwendung, Abbildungen zu finden sind. 



W. Herter. 



Kuschke, G., Mycoflorae Caucasicae novitates. (Moniteur 

 jard. bot. Tiflis. 1913. XXXI. p. 23—26. Russisch.) 



Mit latein, Diagnosen werden als neu beschrieben: 

 Exoascus Cerasi-microcarpae G. Kuschke n. sp. (in fructibus ju- 

 venilibus Cerasi microcarpae Boiss., prope Elisabethpol, Transcau- 

 casia); Melanconiuni Pterocaryae G. Kuschke n. sp. (in ramisjuveni- 

 libus Pterocaryae fraxinifoliae Sp. in Abchazia); Steganosporium 

 Daphnes G. Kuschke n. sp. (in ramulis Daphnes oleoidis Schrib., 

 prov. Kars). Matouschek (Wien). 



