194 EFFECTS OF WEATHER CHAP. 



found,) seem to encourage a suspicion, that its 

 agency is concerned in producing every change 

 in the universe. 



SECTION II. 



OJ the Effects produced by Peculiarities of the 

 Atmosphere on Plants. 



NOT only the animal, but also the vegetable 

 kingdom, appears to be affected by peculiarities 

 of the atmosphere, which do not consist in its 

 degree of temperature or pressure. For ex- 

 ample, in the summer of 1810, almost all the 

 Plane Trees, with the rough bark or rind,* be- 

 came diseased in the neighbourhood of London, 

 and for many miles round ; very few of which, 

 in comparison with the whole number decayed, 

 recovered so far as to throw forth buds the 

 ensuing spring, while the smoothrined Plane 

 Treesf and Sycamore Trees}: remained healthy. 

 The season was not either remarkably hot nor 

 very unusually dry ; but there were all those 

 circumstances alluded to in a preceding section 



* Platanus Occidental is + Platanus Orientalis. 



+ Acer Pseudoplatanus. 



