American Edition of the British Encyclopedia; Or, Dictionary of Arts and Sciences; Comprising an Accurate and Popular View of the Present Improved State of Human Knowledge Volume 6

American Edition of the British Encyclopedia; Or, Dictionary of Arts and Sciences; Comprising an Accurate and Popular View of the Present Improved State of Human Knowledge Volume 6

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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. 1819 edition. Excerpt: ...extends in each-. which fifth part of wax and labour saved amounts to a vast deal in the whole comb. And if these admirable insects knew their advantage, they could not more nicely observe the rules of modern geometry. The method of making two sorts of cells in each comb is also admirably contrived to save the expense of wax; since, had they been made single, every comb must have had its peculiar base, and every se: of cells their bottom of wax, whereas one bottom serves now for two cells; and there is but one plate of wax in the centre of a double comb. This structure occasions a very great sparing of the wax, or matter of the comb; but besides this, there is another great advantage-resulting from tliis structure, which is, that the angles arising from the forementioned combination of the bases greatly strengthen the whole work. The sides of the cells are all much thinner than the finest paper, and yet they are so strengthened by their disposition, that they are able to resist all the motions of the bee within them, as they are frequently obliged to be. The effect of their thrusting their bodies into the cells would be the bursting of those cells at the top, were not these well guarded against. But to prevent this, the creatures extend a cord, or roll of wax, round the verge of everj'cell, in such a manner, that it is scarce possible they should split in that particular part. This cord or roll is at least three times as thick as the sides of the cell, and is even much thickcr and stronger at the angles of the cells than elsewhere, so that the aperture of each cell is not regularly hexagonal, though its inner cavity be perfectly so. The several combs are all placed parallel to one another, and there is such a space left between them, that...show more

Product details

  • Paperback | 234 pages
  • 189 x 246 x 12mm | 426g
  • Rarebooksclub.com
  • United States
  • English
  • black & white illustrations
  • 1236864220
  • 9781236864222