"Silica" Quotes from Famous Books
 ... twigs of the coffee tree, yielded 33 grains of ashes, or 3.300 per cent. The ashes consist of potass, lime, alumina, and iron in the state of carbonates, sulphates, muriates, and phosphates, and a small portion of silica. According to Liebig's classification of plants, the coffee tree falls under the description of those noted for their preponderance of lime. Thus the proportions in the coffee ...
— The Commercial Products of the Vegetable Kingdom • P. L. Simmonds
... dedication and saint-lore? Probably not. South of Cadgwith are some of the grand caves and rock-freaks that have a more immediate appeal, and north of the hamlet some of the best serpentine is obtained. Serpentine is a blend of silica and manganese, so named from its imagined resemblance to a snake's skin; its colour varies from green to red and brownish yellow, and is often remarkably beautiful. It has been used with striking effect, architecturally, in Truro Cathedral; while ...
— The Cornwall Coast • Arthur L. Salmon
... matter that has never been alive. Through all the little hairs of its roots it sucks in water, and in this water are dissolved more or less of the salts of ammonia, phosphorus, sulphur, iron, lime, magnesia, and even silica, or flint. In all kinds of earth there is some iron, and we shall see presently that this is very important to ...
— The Fairy-Land of Science • Arabella B. Buckley
... as if they had minute brains in their extremities. They feel their way into the soil; they know the elements the plant wants; some select more lime, others more potash, others more magnesia. The wheat rootlets select more silica to make the stalk; the pea rootlets select more lime: the pea does not need the silica. The individuality of plants and trees in this respect is most remarkable. The cells of each seem to know what particular elements they want from the soil, as ...
— Under the Maples • John Burroughs
... tends to spread outwards through the surrounding felspar. Chlorite also is abundant both in sheared and unsheared diabases, and with it calcite may make its appearance, or the lime set free from the augite may combine with the titanium of the iron oxide and with silica to form incrustations or borders of sphene around the original crystals of ilmenite. Epidote is another secondary lime-bearing mineral which results from the decomposition of the soda lime felspars and the pyroxenes. Many diabases, especially those of the teschenite sub-group, ...
— Encyclopaedia Britannica, 11th Edition, Volume 8, Slice 3 - "Destructors" to "Diameter" • Various
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