5S0 



lit' marls tipon Coloucl li\'ul\\ aitcmpt 



The above contains the spirit ofincKy nearly all the snhjeels advert- 

 ed to in Col. Rcid's work. Among- ihc rest, there arc singgeslitms lor 

 registering the state of the barometer at the several liglU-lionscs ;it places 

 on this side of the Cape, and lor eolleeting information from the logs of 

 ships which have encountered bad weather, &'c. Account of water- 

 spouts — whirlwinds, &c. In furtherance of these wishes I will here 

 mention one objection — which, although not disproving the theory that 

 storms arise from rotatory and progressive whirlwinds — still renders ne- 

 cessary some explanation beyond that of rotation and progression. In 

 England, for several years I had been in the daily liibit of noting the 

 indications of the barometer, and on the occurrence of gales of wind, 

 my attention was very particular. I have no memoranda by me at this 

 moment to offer in evidence, but I may mention, that I had invariably 

 noticed — ihat the rale at ivhicli ike barometer rose aft'r gales had reach- 

 ed their climax, ivas ahvays miK h move rapid than that it had observed 

 iti falling preciously thereto;' and, on consulting the observations 

 made at Madras and other places, the same circumslnnre I find alivays 

 occurs. Thus, during the gale of wind at Madras in 1797, we have the 

 following recorded observation : — 



Date. 



Barometer Hourly Wind. 



Oct. 25lh at noon 

 27th — 2 P. M. 

 28th — 6 A. M. 



inches. 

 30.005 > 

 29.405 J 

 29.819 ( 



var. 

 .011 

 .022 



Remarks. 



Gale of wind. 

 Do. at height. 

 Do. had subsided, 



In the gale of wind at Madras in October 1818 : — 



Oct. 23d at 8 P. M. 29.80 N. Very high wind. 



24th -5 A.M. 29.50/ ,3^ A violent , ale. 



04th — 10^ A.M. 28.78; calm An awful lull. 



24th — 12 A.M. 29.23 [ 



.333 



Hurricane at 1 1 h. 



In the gale of wind at Madras in May 1820 



Oct. 



8th at 10 A.M. 



8th — 8 P. M. 



9th — 6 A.M. 



9th — 12 A.M. 



9th — 3 P. M. 



9th — .5 P. M. 



9ih— 9 P.M. 

 iOth — 6 A. M. 



29.750 



29.400 

 29.135 > 

 28.816 * 



N.W. Very strong wind. 

 N.W. Strong gale. 

 Gale increasing. 



28.G70 

 28.5* I 

 29.633 \ 



.106 

 .073 



,23 



W. 



S.W. 



Ditto. 



Still stronger. 

 Continues. 



G .l^atits height. 

 Moderate weather, 



* This is assumed with reference to the two previous observations, but it appears that 

 ao actual obsevvatiou of the barometer was made at this moment.^ 



