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Página 260 - SOWERBY'S ENGLISH BOTANY: Containing a Description and Life-size coloured Drawing of every British Plant. Edited and brought up to the Present Standard of Scientific Knowledge by T. BOSWELL (formerly SYMB), LL.DFLS, &c. With Popular Descriptions of the Uses, History, and Traditions of each Plant, by Mrs. LANKESTEB, Author of " Wild Flowers Worth Notice," " The British Ferns,
Página 164 - T.he Micrographic Dictionary: a Guide to the Examination and Investigation of the Structure and Nature of Microscopic Objects.
Página 120 - HALF-HOURS WITH THE TELESCOPE : a Popular Guide to the Use of the Telescope as a means of Amusement and Instruction.
Página 166 - HARRIS, W. A GUIDE to the INSTITUTIONS and CHARITIES for the BLIND in the United Kingdom. Together with Lists of Books and Appliances for their Use, a Catalogue of Books published upon the subject of the Blind, and a List of Foreign Institutions, &c. Demy 8vo, cloth, 3.r.
Página 120 - HALF-HOURS WITH THE STARS: a Plain and Easy Guide to the Knowledge of the Constellations. Showing in 12 Maps the position oi the principal Star-Groups night after night throughout the year.
Página 97 - On the whole, then, while giving due credit to Prof. Huxley and those who have preceded him in this matter, for directing attention to this curious and no doubt important constituent of mineral fuel, and admitting that I may possibly have given too little attention to it, I must maintain that Sporangite beds are exceptional among coals, and that cortical and woody matters are the most abundant ingredients in all the ordinary kinds; and to this I cannot think that the coals of England constitute an...
Página 99 - A single trunk of sigillaria in an erect forest presents an epitome of a coal-seam. Its roots represent the stigmaria underclay; its bark the compact coal; its woody axis the mineral charcoal ; its fallen leaves and fruits, with remains of herbaceous plants growing in its shade, mixed with a little earthy matter, the layers of coarse coal. The condition of the durable outer bark of erect trees, concurs with the chemical theory of coal, in showing the especial suitableness of this kind of tissue for...
Página 99 - Stigmaria underclay; its bark the compact coal; its woody axis, the mineral charcoal; its fallen leaves (and fruits), with remains of herbaceous plants growing in its shade, mixed with a little earthy matter, the layers of coarse coal. The condition of the durable outer bark of erect trees concurs with the chemical theory of coal, in showing the especial suitableness of this kind of tissue for the production of the purer compact coals. It is also probable that the comparative impermeability of the...
Página 241 - These laminee are separated by short vertical piles of cells, believed to be medullary rays. In the transverse section the intersected mouths of the vessels form radiating lines ; and the whole structure is regarded as an early type of an exogenous cylinder; it is from this cylinder alone that the vascular bundles going to the leaves are given off. This woody zone is surrounded by a very thick cortical layer, which is parenchymatous...