Rust, Smut, Mildew, & Mould: An Introduction to the Study of Microscopic Fungi

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R. Hardwicke, 1865 - Всего страниц: 238
 

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Стр. 12 - Has a thought about her nest, Thou wilt come with half a call, Spreading out thy glossy breast Like a careless Prodigal; Telling tales about the sun, When we've little warmth, or none.
Стр. 81 - Glauber's salts, in which the seed corn is to be washed, and afterwards, whilst still moist, dusted over with quick-lime. The rationale of this process consists in the setting free of caustic soda by the sulphuric acid of the Glauber's salt combining with the lime, and converting it into sulphate of lime. The caustic soda is fatal to the germination of the spores of
Стр. 76 - smut," in others it is respectively " dust-brand," " bunt-ear," '' blackball," and " chimney-sweeper," all referring, more or less, to the blackish soot-like dust with which the infected and abortive ears are covered. This fungus does not generally excite so much concern amongst farmers as the other affections to which their corn-crops are liable.
Стр. 147 - Suffice it to say, that the lapse of years has silently proved the majority of these to have been fallacious. All such as imputed to peculiar electric conditions, a wet season, or other meteorological influences...
Стр. 183 - ... covers, when folded- separates each order. " When a leaf, or other portion of a plant, is to be examined under the microscope, with the view of determining the genus and species of its parasite, it may be fastened with small pins to a piece of sheet cork, two or three inches square, and about one eighth of an inch in thickness, such as used for lining entomological cabinets, and so placed under a lens that it may easily be brought into focus, and both hands left at liberty ; or a dissecting microscope...
Стр. 148 - ... matrix, which in consequence withers. No sooner have a number of the leaves been attacked, than the stem itself is subject to change, becoming spotted here and there with dark brown patches, in which the cells are mostly filled with a dark grumous mass, without exhibiting any mucedinous filaments; though, occasionally, I have ascertained their presence. Very rarely fructifying but dwarfed specimens of the mould occur upon it.
Стр. 7 - ... individual cups, to ascertain their manner of distribution over the leaves. In this instance they are scattered without any apparent order over the under-surface, but generally thickest towards the summit of the leaves ; occasionally a few are met with on the upper surface. Sometimes two or three touch at the margins, but we have never met with them truly confluent ; generally there is a space greater than the width of the cups around each, the stratum or subiculum from whence they arise is scarcely...
Стр. 149 - Sdtrotivm varium, and which are believed to be the mycelium of certain moulds in a high state of condensation. If the tubers are now examined, the greater part will often be found smaller than usual, especially if the disease has commenced at an early stage of growth ; but in their natural condition, while here and there a tuber, particularly if it has been partially exposed, exhibits traces of disease. The surface is, however, soon marked with livid patches, commencing generally about the eyes,...
Стр. 7 - ... through which the fungi have burst will appear in irregular holes, and the fungi will be left rooted still upon the leaf, showing that they are not confined to the surface, and thus we see why the damage is so great to the plant upon which they subsist. The spores in this species are orange in color, but variable both in size and form, though the majority are comparatively large. Each of these spores is capable of reproducing its species, and if we compute two thousand cluster cups as occurring...
Стр. 146 - L p. 11. electricity. Towards the close of the month of August I observed the leaves to be marked with black spots, as if ink had been sprinkled over them. They began to wither, emitting a peculiar, offensive odour ; and before a fortnight the field, which had been singularly luxuriant, and almost rank, became arid and dried up, as if by a severe frost. I had the potatoes dug out during the month of September, when about two-thirds were either positively rotten, partially decayed and swarming with...

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