Memoirs and Proceedings - Manchester Literary and Philosophical Society Volume 3

Memoirs and Proceedings - Manchester Literary and Philosophical Society Volume 3

List price: US$12.59

Currently unavailable

Add to wishlist

AbeBooks may have this title (opens in new window).

Try AbeBooks


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. 1790 edition. Excerpt: ... these several. materials. M. du Fay's experiment, which he made before the Royal Academy of sciences, has been so often related, that I shall not quote the particulars. Let us rather refer to the theoriei which have been advanced to account for these phenomena, inquire how far they appear to be _ founded on truth; and give the chemical analyses of the various substances, which may perhaps serve to throw some new light on the subject. These phenomena have been variously explained. Some have attributed the variety in the power of the several substances to retain the dying ingredients applied to them, to the different structure of their filaments; to the porofity of wool, and to the impenetrability of COUO" and linenz at least, to the latter posscffiflg ss pores of much inferior dimensions; filk being supposed to hold a middle rank. Wool, sal' these theorists, is composed of numerous filfl-a ments, fimilar to hairs, and like them confisting of tubes, containing a medullary oroily masfflThe sides of these tubes are also perforated will! an infinite number of small orifices, communicating with the longitudinal canal. From thiS mechanism, it is excellently adapted for receiving extraneous bodies, which are not only capable Of Le Pilcur d;Apligny Art de la Teinture des fils, Be etoffes de Coton. _ 'being applied to the superficial pores of the filal ments, but even of penetrating into the interior structure of the tubes, when divested of the medulla they naturally contain. Silk is described, by these writers, as a glssutin-r ous liquor, sormed in, and excretcd from, the _ body of the (ilk worm, who spins it into a kind of thread, which hardens on exposure to the air. An operation.which is facilitated by another substance, analogous to wax, more

Product details

  • Paperback | 146 pages
  • 189 x 246 x 8mm | 272g
  • United States
  • English
  • black & white illustrations
  • 1236897064
  • 9781236897060