Researches about atmospheric phaenomena / By Thomas Forster.

  • Thomas Ignatius Maria Forster
Date:
1823
Catalogue details

Licence: Public Domain Mark

Credit: Researches about atmospheric phaenomena / By Thomas Forster. Source: Wellcome Collection.

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    RESEARCHES. CHAPTER I. ‘ i OF M. HOWARD’S THEORY OF THE ORIGIN AND MODIFICATIONS OF CLOUDS. A cLoup is a visible aggregate of minute particles of water suspended in the atrho- sphere. In the more extensive signification of the word, smoke and all the visible effluvia of volatile substances may be considered as clouds ; meteorologists have, however, confined this term to aqueous particles.* * Our English word Cloud is derived of the Anglo-Saxon verb hlidan or Lehlidan, tegere, to cover; from the same verb came glade, blot, lot, and lid. In like manner, the Latin’ ubere; and from the same verb is derived nupta. So the Greek yegos and vegedy from vegeov.. It need hardly be ob- served here, that all that words can do, is to express some of B