made at Clapton. 407 



the sky seemed veiled with irregular folds of this cloud : 

 rain in showers came on by five o'clock P. M. 



Mmj 13— W. Fine early; clouds in two strata ; rain 

 with hail and thunder shower in the day ; fine evening again. 



Alcy 14. — W.S.W. Fine clear morning ; afterwards 

 clouds m two strata obscured the sky with a haziness be- 

 low. Petroid cumulosiratus, &c. appeared, and showers came 

 on, but- the evening became fine. 



May 15. — Fine veil of cirrus spread on high, while a 

 sheet of partly cirrostralus and cirrocumi/lus appeared lower ; 

 partial detached (f/To^/rft/'i also were seen; rain came on, 

 and continued gently falling ahnosi the whole day. After 

 sunset a fine crimson blush appeared just abcjve the occi- 

 dental horizon. 



May 16. — N. Fair day; early appeared cirrus breaking 

 out into cirrocnmidus, while cirroslratus also appeared 

 lower, and cumvli still nearer the earth. Towards evening 

 cumulostratus obscured the sky. 



May 17. — N. Cold north wind and cloudy; small rain 

 in the evening. 



May 18.— Rain early, afterwards fine and warmer; the 

 sky however was pale coloured, and cirri were scattered 

 about above cirrostrati ; a sort of loose flimsy beds of cirro- 

 cumulus, and lastly ciimuli. 



May 19. — S. Cloudy morning; cumulostratus ^oWowtA 

 by storms with thunder and lightning in the evening. The 

 lightning continued all night; but the thunder, which began 

 here about eight o'clock, ended before ten*. 



May '20. — The different modifications appeared with 

 occasional nimbification. Fine evening, with beautiful 

 petroid cumuloslrati. Lightning by night. 



Clapton, May21, 18l2. ThOM AS FoRSTER. 



* The storms of thunder commenced much sooner at Walthamstow than 

 they were lieard at Clapton. This would induce a behef that the storms 

 were tow in the atmosphere. At Epping, ten miles to the north-eait, tlie 

 thunder beijan and ended about the same time as at Hackuey. From tlie 

 accounts wjiich I have often received of the time of the occurrence of slornis 

 in diflerent parts of the country, I have been induced to tlviik that fre- 

 quently asiumhaneous production of them took place in very distant mas,es 

 of atmosphere. This can only be ascertained by noting down accurately 

 the precise pcricd of their commencement and tniie of their duration in 

 difTerent places. A circumstance to which I wish to calt the atteutiou of 

 meteorologists. 



JVIETEORO- 



