The Young Gardener's Educator

The Young Gardener's Educator

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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1861 edition. Excerpt: ...other substances which, on the contrary, contain less. "Wax, resins, oils, &c., have hydrogen in excess. Oxalic acid, tartaric acid, malic acid, and others met with in plants, have the oxygen predominating over the hydrogen. "When, therefore, the vegetable substance be. of the nature of lignin, or woody fibre, in which the. hydrogen and oxygen are exactly in the proportions to form water it is obvious that water may be taken up by the plant; and its elements appropriated without necessarily undergoing decomposition; but, on the other hand, when the vegetable substance is of the nature of wax, resin, &c., then it follows as a matter of necessity that water be decomposed, in order to furnish the excess of hydrogen, and, at the same time, oxygen must be liberated in equivalent proportions. It must not be supposed, however, that the oxygen and hydrogen in the proportions to form water in the plants exist in them as water; these elements, like the carbon, have altogether put on different properties from those which we recognise as belonging to them when examined in their free and isolated state, a change of character depending, no doubt, on that mystic force called vitality, at present totally beyond our limited comprehension. Mr B. I will this evening endeavour to explain to you how the crust of the earth has been formed, and how it has been affected and modified by volcanoes, by the waters of seas and rivers, and by other means and agencies. There are three causes which have contributed to the production of the earth's crust. First, the hardening of the surface by cooling; second, the action of subterranean heat in throwing up eruptive rocks through fissures to the surface, and also consolodating "nether-formed" more

Product details

  • Paperback | 88 pages
  • 189 x 246 x 5mm | 172g
  • Miami Fl, United States
  • English
  • black & white illustrations
  • 1236603370
  • 9781236603371