Fungi, Bacteria und Pathologie. 149 



^ESSARD, C, Sur l'antiperoxydase de Russula delica. (C. R. 

 Öoc. Biol. Paris. T. LX. 16 mars 1906. p. 505—506.) 



Le suc de Russula delica Fr. contient ä la fois laccase, tyro- 

 synase et peroxydase. La macdration glyc^rinde de ce Champignon, 

 inject^e sous la peau des Lapins, conf^re au sdrum des propridt^s 

 antilaccasique, antityrosinasique et antiperoxydasique. Le s^rum 

 empeche le bleuissement de la teinture de gayac sous l'influence du 

 suc de Champignon, mais 11 est sans action sur la peroxydase du 

 malt. L'action est donc sp^cifique; on doit parier, non d'antiperoxy- 

 dase sans complement, mais d'antiperoxydase de Russula delica. 



Paul Vuillemin. 



Massalongo, C, Di un nuovo micocecidio dell' Amarantus 

 sylvestris Desf. (Bull. Soc. bot. ital. 1904. No. 7—8. p. 354.) 

 Parmi les Phycomycetes qui vivent en parasites sur les Amarantus, 

 il y a le Cysiopus Bliti de Bary. Tandis que sur VA. retroflexus ce 

 parasite se trouve sous forme de conidies et d'oospores, sans produire 

 d'altdrations hypertrophiques, sur IM. sylvestris au contraire, il pro- 

 duit des hypertrophies remarquables; cette action porte ä considdrer 

 cette forme de Cystopus comme une nouvelle mycocecidie qui se 

 developpe diversement, selon la plante atteinte. 



Pavolini (Florence). 



Pethybridge, George H., The Causes of Blowing in Tins of 

 Condensed Milk. (Economic Proceedings of the Royal Dublin 

 Society. Vol. 1. No. 7. p. 306—320. February 1906.) 



Tins of Condensed milk sometimes become bulged outwards or 

 „blown", the phenomenon occurring irregularly and being usually 

 apparent some six weeks after manufacture. The milk in such tins 

 differs but slightly in taste, appearance etc. from that in normal tins 

 but contains small clots, in which and also in the rest of the milk yeasts 

 or torulae are found. The author demonstrates that these yeasts 

 are capable of producing the effect. They are capable of fermenting 

 saturated Solutions of canesugar in milk, and it is not practicable 

 to kill them by heat during manufacture as the milk itself is turned 

 brown and depreciated in value. Preventatives are not advisable and 

 are not employed. 



The introduction of the yeasts was traced to the milk in two cases 

 and careful examination of the milk used is recommended as the best 

 means of preventing the trouble. The adoption of this plan has 

 brought about good results. W. G. Freeman. 



Stevens, F. S., Fungus diseases of the apple. (North Caro- 

 lina Agric. Experiment Stat. Bull. No. 183. p. 64—82. f. 12 

 —22. April 1903.) 



The bulletin contains a populär description of the following 

 diseases of the apple together with recommendations for treatment: 

 Apple scab; Fire blight; Apple rust; Bitter rot; Black rot; Soft rot 

 and Powdery mildew. 



The second chapter deals with the following diseases of the 

 pear: Fire blight; Anthracnose; Pear rust; Pear canker; Pear scab, 

 the Leaf spot and the Leaf blight. 



The bulletin closes with a description of the following diseases 

 of the quince: Quince rust; Fire blight; Leaf blight and Fruit spot; 

 Black rot, and Ripe rot. Eleven figures accompany the text. 



von Schrenk. 



