72 OF CLOUDS. CHAP. 2. 11. 



called summer lightning, are not followed by 

 any thunder at all. 



By a collation of journals, it appears that 

 the occurrence of thunderstorms is often nearly 

 simultaneous in very distant parts of the country, 

 which indicates a disposition to their formation 

 taking place in large tracts of atmosphere at 

 once. But at other times they are very local 

 and detached. Monday, the 29th of July, 1822, 1 

 was witness toavery violent storm about 6. P.M. 

 at Gex, by the Lake of Geneva, which returned 

 again with great violence, while I was travelling 

 with Mrs. Forster near Nyon, at 8 o'clock at 

 night. On the 30th still more tremendous Storms 

 of Thunder Lightning and Rain, fell between 

 Lausanne and Vevai, which destroyed all the 

 grapes in the vineyard of M. Huber, of Belle 

 Air. By a collation of observations, it appeared 

 that at the same time violent and mischievous 

 Storms occurred in France, all along the Rhine, 

 through Holland, and in England as far as 

 Bridgenorth in Shropshire, and were character- 

 ized by their destructive character in all those 

 countries.* For more particulars relative to the 

 electric phaenomena of thunderstorms and nimbi 

 in general, refer to the chapter on Electricity. 



* See my Letter in Philosoph. Mag. for Sept. 1822. 



