Philosophical Transactions Volume 19

Philosophical Transactions Volume 19

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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. 1698 edition. Excerpt: ...ductible in the Flame of a Candle, Cffc. it agrees with it. Qtz, Whether the Extracted Juice of the waim-, Rhubarb be more inflamable than ours? 1 may not omit, that the repeated Cuts i gave the Stalk, on purpose to have of the Gum that way, failed my Expectzation. This Gum is sweet, or rather of no taste at all. To this purpose remember in Summer time, to have seen even the Juice of Apples spontanioufiy jellied in hnguedoc, and the Apple to look clear and hard like Ice, whence they call that sort of ApplePome Gele/c, or the Frazen Apple. Though indeed, it be nothing else but the breaking or coagulating of the Juice in some spots of it, forit is rare to see oneoi them all over so. Qr. Whether the tart Juice of' Rhubarb will Jelly when Boiled? We may here give a probable reason, why a gentle Infusion or Maceration of Rhubarb. is a very sure Purge, but the Substance or Powder of Rhubarb, or aDecoction thereof, will have a quite contrary effect and bind. We may, lsay, think, that the sharp and tart Juice in Rhubarb, wherein its Purging Faculty lies, is by a gentle Infusion so Extracted, that it turns not to Gum in our Stomach. For! cannot think, that the sower Juice of Rhubarb, is a specically distinct Liquor from the Gum, vrhich believe to be only an accidental Coagulation. Qu, Whether the drying of Plants do not alter their Juices? Whether a long and competent keeping of our English Rhubarb, will not quicken_and encrease its Purging Virtue? Whether the Juice of dryed Plants, spend their Juices upon Maceration or Decoction lefler, or more freely then green ones? What difference betwixt a Decoction or Maceration of green and dryed Plants. Green Plumbs or Sloes do often break forth with a Gum, which is clear and transparent, and it seems to...show more

Product details

  • Paperback | 118 pages
  • 189 x 246 x 6mm | 227g
  • Rarebooksclub.com
  • United States
  • English
  • black & white illustrations
  • 1236747461
  • 9781236747464