File:Science-gossip (1896) (14583135080).jpg

Identifier: sciencegossip03lond (find matches)
Title: Science-gossip
Year: 1894 (1890s)
Authors:
Subjects: Natural history Science
Publisher: London : Simpkin Marshall, Hamilton, Kent & Co. Berlin : R. Friedländer & Sohn
Contributing Library: American Museum of Natural History Library
Digitizing Sponsor: American Museum of Natural History Library

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forcash.—A. AUetsee, Clifton, Milward Crescent, Hastings. Wanted, ofiers for Science-Gossip from start, in 1S65,32 vols, I to 2S boimd in publishers cover, remainderunbound.—G. P. Bonny, 30, Wellington Road, Stoke New-ington, London, N. Offered, good recent foreign and some fossil shells ; listsexchanged. Wanted, specially rare British marine. Helixrevelata and Succinea oblonga.—Mrs. Carphin, M.C.S., 52^India Street, Edinburgh. SCIENCE-GOSSIP. 289 FUNGOID PLANT DISEASES. By John T. Carrington. A MONG the inexorable laws of nature that■^^ govern the maintenance of the balance oflife, disease is one of the principal factors inreducing the numbers of any especial species whichis unduly asserting itself in increasing numbers. world with apparently cruel severity. If, however,man could sufficiently understand their effect uponthe future condition not only of the species attacked,but also of the surrounding inhabitants of the regionaffected, he might think less of the inconvenience
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Scene in a Bav.\ri,\n Forest. In the foreground a living beech-tree with seven sporophores of Polyporus join cut ariin. (From Discasts of Plants, published by Longmans & Co.) The most potent forms of disease, whether amongplants or animals, are caused by fungoid orother cryptogamic parasites. To these sourcesmay be traced the various epidemics whichoccasionally sweep large districts of the habitable April, 1897.—No. 35, Vol. III. to the individuals attacked, or of his own. Natureby its forces seldom exterminates the fittestinhabitants, except for the general good, and itis usually the weaker members of the species attacked that succumb. In maintaining the 2go SCIENCE-GOSSIP. balance of life nature does not always resort toepidemic or sporadic efforts. There are alwayswith us certain forms of what we term disease,otherwise various parasitic life that exists at thecost of the hosts upon which it settles. In thevegetable world the most effective in keeping downa superabundance of a

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