Knights Essays

Knights Essays

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1807 edition. Excerpt: ...last the honour to address a communication to you, with a request that you would lay it before the Royal Society, I have repeated great part of the experiments which formed the subjects of my former Letters, with such additions and variations, as 'might probably lead to the detection of any erroneous conclusions which I might have drawn: but I have not been able to detect any errors, nor to add any thing very important to my former observations. I have, however, been able to ascertain a few new facts, which I think too interesting to be lost. I endeavoured, in my-former communications, to adduce evidence, that the matter, which becomes vitally united to trees, previously passes through their leaves; and I shall now proceed to state some facts, which, I trust, will prove, that a fluid possessing the power which I have attributed to the true 'sap, actually descends through the leaf stalks. A slender knife was passed through some leaf stalks of the vine, about two thirds of an inch distant from their junction to the branch; and, down to that point, the leaf stalks were divided longitudinally, and a transverse section, about half an inch long, was made through the bark opposite the middle of the leaf stalk. A similar transverse section through the bark, was made somewhat less than an inch distant below; and these sections were united by two longitudinal sections through the bark, which extended from the extremities of the upper transverse sections to the extremities of the lower; by which means, pieces of bark, about half an inch broad, and nearly an inch long, were separated from the adjoining bark. These were then detached from the alburnum, and surrounded by two folds of paper coated with wax on each side; by which more

Product details

  • Paperback | 28 pages
  • 189 x 246 x 2mm | 68g
  • United States
  • English
  • black & white illustrations
  • 1236781880
  • 9781236781888