An essay of health and long life / By George Cheyne.

  • George Cheyne
Date:
1724
Catalogue details

Licence: Public Domain Mark

Credit: An essay of health and long life / By George Cheyne. Source: Wellcome Collection.

    75/292 page 21
    \ and Long Life. 11 ■ * ' , ‘ \ ' - Three Principles, m. Fir ft, That the Strength or Weaknefs of Cohefion of the Particles of fluid Bodies, depends up¬ on their Bignefs or Smallnefs ; that is, the biggeft Particles cohere more firmly, than thefmaller, becaufe more Parts come into Contact in large Bodies than fmall, and fo their Union is greater. Secondly, That the greater the Force [\Momentum\ is, with which two Bodies meet, the ftrongcr is their Cohefion, and the more difficult their Separation. Thirdly, that Salts, being comprehended by plain Sur¬ faces, being hard, and in all Changes recovering their Figure, unite the moft firmly of any Bodies whatfoever: Their plain Surfaces bring many Points into Contact and Union; Their Hardnefs and conftant Figure make them durable and tmalterable 5 and thereby the active Frin- ciples, and the Origin of the Qualities of Bodies ; and when they approach with¬ in the Sphere of one another's Affinity, they firmly unite in Clujlers, all which make the Separation of their original Farticles the more difficult. I fay, from thefe three Frinciples, we may in gene¬ ral compare the Eafinefs or Difficulty of digefting (that is, breaking into fmall Parts) the feveral Sorts of Vegetables and 1
    No text description is available for this image
    No text description is available for this image
    No text description is available for this image