1849.] Seventeenth Memoir on the Law of Storms. 29 



Abridged note from Mr. Elliott's letter, and the Log of H. M. S. 



Agincourt. 



H. M. S. Agincourt was on the 14th Sept. 1846, in sight of Formosa, Ape's 

 Hill bearing N. N. E. 100 miles: at 8 a. m. wind hauling from East to North and 

 N. N. E. with fine weather and royals set ; Bar. at 1 p. m. 29.86 ; at 5. p. m. the 

 wind shifted to N. W. in a squall with rain ; after which the weather became 

 squally ; at 6.30 p. m. calm, and at midnight a moderate breeze from the N. W. 

 b. N. with a heavy confused swell from the E. N. E, but fine, and wind 

 moderate, being marked as 5. 



15th Sept. — a. m. swell continuing, Bar. had fallen to 29.83 ; made preparations 

 for bad weather. At 6 a. m. gale commenced wind N. W. ; at 7 it was W. N. W. ; 

 at noon, W. b. N., Bar. 29.48, ship having been standing to the South- 

 ward. At 2.30 p. M. S. W. ;* at 6 p. m. S. S. W. and at 7 p. m. South ; La$. 

 at Noon was 21° 18' and Long. 121° 20' East; Bar at 9 a. m. 29.50 and at Noon 

 29.46; Ther. 83° at 1.30 p. m. ; at 3.30 bore up, Bar. 29.63, and by 6 p. m. 

 the Barometer was at 29.70; the North Bashee being in sight bearing S. W. 5 

 miles. 



Mr. Elliott remarks that the E. N. E. swell was so heavy that it 

 would not have been proper to run out against it. His sketch makes 

 the track of the Cyclone to be from the E. N. E. to the W. S. W., in 

 which I quite agree. 



Track N. 



The Mischief's Tyfoon of Sept. 1846. 



Abridged Log of the Clipper Schooner Mischief, Capt. White, from 

 Singapore to China. Civil Time. 



The Mischief was on the 23rd Sept. in Lat. 17° 4' N.; Long. 115° 26'; Bar. 

 at 29.46 ;f Ther. 86 ; p. m. brisk Westerly breezes and threatening appearance to 

 the West and N. W.; 3 p. m. wind hauled to the N. W., at night W. N. W. 

 and N. W. and squally weather. 



24th Sept. — Increasing ; 2 to 4 a. m. much lightning N. E. to N. W. ; 4, 

 threatening appearance to the N. E. and N. W. Making preparations for bad 

 weather ; sharp squalls W. N. W. and N. W. Very wild upper sky, but Barometer 

 steady at 29.94 ; at 10h.30 p. m. Ther. 84 ; heavy N, E. swell getting up from 

 11 last night, which continues ; Noon blowing hard from N. W. with constant rain 

 and squalls ; Lat, 18° 54' N. ; Long. 115° 34' East ; a current to the E. S, E, of 



* Mr. Elliott remarks, "At this time the Bar. rose 0.02 and fell again immedi- 

 ately." 



t Probably an error of the copyist, as it was at 29.94 on the 24th. 



