aE!>lARKS on METEOROLOGY. ^^JQ 



polisliliif^, &c., in which hiird particles are more or less 

 slightly retained in u soft or tenacious substance. Mr. Cum- 

 bei land's instruments appear to promise great utility in the 

 lirat and lavst of these processes; that is, they may be used 

 either with or without a fretting powder. There are however 

 many objections to their belnjj; used to ^riud speculums; not 

 only witli regard to the intended figure, but the nature of 

 the material. 



W. N. 



Remarks on Meteorology. In a Letter from Thomas Furs- 

 TER, Esq. 



To Mr. NICHOLSON. 

 SIR, 



JL Was mucl;i pleased with the perusal of your coriespon- y^^curat .b- 



dent Dr. Bostock's letter on meteoroloory, p. 196, and par- seivanons of 



ticularly with his plan of a diary. I atn of opinion, with ^ ""'^'' impor- 

 •' \ •' ,■• tant to meieo- 



him, that an attention to the several modihcauons of clouds, lolagy. 



and the changes of weather which succeed them respective!}', 

 is of great importance in meteorology ; and it is much to be 

 wished, that more accurate and frequent observations of 

 this sort were made. A want of a nomenclature capable of 

 expressing clearly all the different rnodihcations of cloud 

 has been the reason, why this branch of the science has been [sfomen lat • 

 Jiitherto so little attended to by meteorologists, but your cor- of them by 

 respondent does not seem to be aware, that this is no longer "oward. 

 a desideratum in meteorology. The ingenious Mr. Luke 

 Howard, of Plaistow, published a few^ears ago a short trea- 

 tise on the various modifications of clouds, in which be has 

 determined their distinctive characters, and shown tlie man- 

 ner in which they are probably formed. The substance of 

 this pamphlet may be found in Rees's Encyclopedia under 

 the word cloud. In a meteorologicaldiary, which I keep, lal- ^'^^^f » ™»- 

 ways note down the different modifications, placing in a pa- dlary."'^'^ 

 -rallel line all those which appear in the sky at once. I 

 • . S 2 would 



