1842.] A Sixth Memoir on the Law of Storms in India. 671 



At 10 p. m. the wind suddenly shifted to W. N. W. TN. N. W. ?] in 

 a squall. — Heavy rain and distant thunder until 5 a. m. : — Had con- 

 tinued shifts of wind all round the compass. — At J a.m. & steady gale 

 very severe, from about N. W. and constant rain : — hove to under the 

 reefed main-top-sail : — At 8 a. m. barometer 29. / / — Latter part and 

 end, the real genuine, unadulterated Chinese Tyfoon ; a steady roar 

 and constant rain; took in the main-top-sail. 



August 4th. (p.m. of 3d.) The first quarter of this day extremely 

 severe gale and thick weather. — At 2.30 p. m. barometer 28.88 ; 

 shortly after which it began to rise: — at 6 p.m. 29.05 ; — at%p. m. 

 29.08, and moderating. — During the night, hard gale from N. W. to 

 W. S. W. and torrents of rain. — At 4 a. m. wind S. W to S. S. W. and 

 hazy: — made sail and by 5 a. m. had royals and studding sails set. 

 During the day passed a number of wrecks, and when we arrived, 

 (5th,) found that the hurricane had been very severe, and caused im- 

 mense destruction/' — New York Journal of Commerce. 



I have given these logs as they stand in Mr. Redfield's pamphlet, 

 but I should be inclined to think, that the Caledonia's storm might be 

 nothing more than a monsoon gale, of which we have so many exam- 

 ples, and which like those of the Bay of Bengal, may be more liable to 

 happen when a circular storm is travelling across in the leeward part 

 of the Bay or sea. 



The u American ship master" whose name is not given, seems to 

 me, when he experienced his shift of wind at 10 p. m. of the 3d, to 

 have been just on the limit between the Macao tyfoon and the mon- 

 soon gale of the Caledonia, for it was certainly not the centre, which 

 at 5 p. m. was at Macao, and if it had travelled to the Southward to 

 reach the American ship, would have left that place with a gale from 

 the N. E., or S. E., or East, whereas by taking the Macao tyfoon to 

 have extended to about this latitude only, which gives it a semi-dia- 

 meter of 75, and consequently a diameter of 150 miles, and the Cale- 

 donia's storm as a moonson gale, the steady breeze at W. N. W. &c, 

 which the American ship had in latitude 20°, (or half way between the 

 Caledonia and Macao,) until he ran into the Southward, half of the 

 storm is clearly accounted for. 



On these grounds, then, I have marked for this tyfoon, an East and 

 West track, No. XIX. though it should be borne in mind, that it 

 might really have been a point, or even more to the North or South 

 of East and West, but we have no data, from which to say positively 

 that it was so. 



