* 





Vegetable Stat'tch 



3? 



i 



caufcof it; viz. They frequently obferve 

 (cfpccially with the reflecting Telcfcopcs) 

 fmall fcparate portions of pellucid vapors 

 floating in the air 5 which tho' not vifiblc to 

 the naked eye, arc yet confidcrably denfer 

 than the circumambient air : And vapors of 

 mch a degree of denfity may very proba- 

 bly, cither acquire fuch a fcalding heat from 

 the Sun, as will fcorch what plants they 

 touch, cfpccially the more tender : An effect, 

 which the gardincrs about London have too 

 often found to their coir, when they have 

 incautioufly put beil-glaUcs over their Colly- 

 flowers, early in a frofty morning , before 

 the dew was evaporated off them; which 

 dew being raifed by the Sun's warmth, and 

 confined within the glafs, did there form a 

 denfe traniparent fcalding vapor, which burnt 

 and killed the plants. Or perhaps, the -up- 

 per or lower furface of thefe traniparent fc- 

 parate flying volumes of vapors may, among 

 the many forms they revolve into, fometimes 

 approach fo near to ahemifpherc, or hemi- 

 cylindcr, as thereby to make the Sun-beams 

 converge enough, often to fcorch the more 

 tender plants they mail fall on: And fome- 

 times alfo, parts of the more hardy plants 



P 3 and 





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