206 SUMMARY OF CURRENT RESEARCHES RELATING TO 



herbarum, species of Epicoccum, Aspergillus, Gatenularia, Mucor, Rhizopus, 

 Macrosporium and Monilia. Saito found that there was remarkably 

 little difference in spore contents between the air of hospitals, 

 gardens, and laboratories. 



Wounds and Gummosis in the Amygdalae.* — M. W. Beijerinck 

 and A. Rant have studied the question of the origin of gummosis in 

 trees* both by observation and experiment. They chose peach and 

 almond trees as most suitable for their purposes ; the parasitic fungus 

 to which gummosis on these trees is attributed is Coryneum Beijer- 

 incTcii. The authors studied the tissue changes that take place in the 

 tree in consequence of infection by the fungus, and the physiological 

 conditions that result in the formation of gum. They find that in 

 certain cells where the protoplasm has been killed the enzymes remain 

 active ("necrobiosis") and produce gum in great abundance. All 

 agents that induce the condition of necrobiosis increase gum production. 

 There are various kinds of fungi that gain entrance by wounds in the 

 trees. The authors consider that this might be of economical advan- 

 tage, and that artificial gummosis might be induced by infection with a 

 suitable fungus such as Coryneum. 



Poisoning by Fungi.f — J. Hockauf has investigated a supposed 

 case of poisoning by Helvetia. He tested both Morchella and Helvetia 

 by supplying them to animals. The brains of the animals were then 

 examined, with constantly negative results. The author considers that 

 the conditions of growth of the fungi must have considerable influence 

 in the production of poisonous qualities. Helvetia he considers to be 

 always rather dangerous as an edible. It is not allowed in the markets 

 of Austria ; it is, however, sold in Munich. 



Anonymous — TTeber die Getr eider oste. unter besonderer Beriicksichtigung ihres 

 auftretens im jahre 1904. (On rusts of cereals, with special consideration of their 

 appearance in the year 1904.) 



Kgl. Agrik. bot. Anst. MilncJien. (Practical leaflets for plant 



growth and plant protection, iii. (1905) heft 5-7.). 



See also Centralbl. Bakt., xv. (1905) pp. 483-4. 



Arthur, J. G. — Amphispores of the Grass and Sedge Busts. 



Proc. Indiana Acad. Set., 1904, p. 64. 



Baccarini, P. — I Funghi dello Schen-si settentrionale raccoltidal Padre Giuseppe 

 Giraldi. (The fungi of the Northern Schen-si, collected by Father Giuseppe 

 Giraldi.) 



[The list includes large and small forms of fungi. Two new species are 

 described.] Nuovo Giorn. Bot. Ital., xii. (1905) pp. 689-98. 



Beardslee, H. C. — The Amanitas of Sweden. 



[Notes on species observed by the author, and compared with American 

 species.] Journ. Mycol., xi. (1905) pp. 212-16. 



Bergamesco, G.- — Basidiomioete ed Ascomicete. 



[A list of 51 species of the larger fungi, collected by the author in the wood 

 of the Camaldoli, near Naples, in the spring of 1905.] 



Nuovo Giorn. Bot. Ital, xii. (1905) pp. 652-6. 



* Centralbl. Bakt., xv. (1905) pp. 366-75. 



t Wiener Klin. Wochenschr., xviii., No. 41 (1905) 8 pp. See also Bot. Centralbl. 

 ci. (1906) p. 103. 



