1841.] Fourth Memoir on the Law of Storms in India. 899 



pany with us just before the gale arrived like ourselves without 

 damage, all which circumstances would lead to the inference, that the 

 gale was partial in its violence, as well as different in its direction. 

 I shall be happy to communicate any further particulars, if I have 

 omitted any thing you might wish to know. 



The following Statement is abridged from the Log Book of the Calcutta 

 Thetis, and the reply of Captain Roche, commanding her^ to some 

 queries addressed by me to him. The dates relate to civil time. 



The Calcutta Thetis left Singapore on the 13 th September at day 

 light ; she had light Southerly and SW. 3 and 4 knot (rarely 5 knot) 

 breezes to the 20th; having passed Pulo Sapata at 9^ a. m. on the 

 18tb, on which day at noon her Lat. was 10^ 10' N. Long. 109° 24' 

 E. ; on the 19th she was in Lat. IP 44' N. Long. 111° 16' E. Bar. 

 29.79 Ther. 92°. Current for the past 24 hours, NE. by E. 71 miles, 

 having had 60 miles to the NE. the two preceding days. 



20th September She was steering NE. with SW. and WSW. airs 



and fine weather. At noon. Lat. 12° 40* N. Long. Chr. 1 1 1° ^6' 45" E. 

 Bar. 29. 79. Ther. 89°. Current NE. | E. 18 miles. At Midnight 

 squally weather. 



2\st September, — Fine and smooth water; light airs from WNW. 

 till 7 A.M. At noon Lat. 15° 20, N. Long. Chr. 112° 40' E. Bar. 

 29.70. Ther. 89°. A light drain of current to the NE. ; 7 p. m. breeze 

 freshening from NNW. with squalls. Course NE. going 6.4 knots. At 

 midnight thick cloudy hazy weather. 



22nd September. — Running to the NE. as before, with wind at 

 NNW. to 4 A.M. when it was NW. Day -light thick unsettled weather, 

 with a head sea; going 5 knots to NE. with wind WNW. Noon Lat. 

 14=^ 55' N. Long. Chr. 114° 17' E. Bar. 29.56. Ther. 86°. Current 

 NE. i N. 16 miles. Wind W by S. — p. m. strong breezes WSW. and 

 SW. At 5 p. M. every appearance of bad weather ; sea rising from 

 NE. made all preparations. At 9° 30' heavy squalls, wind being at 

 SW. from 6. p. m. ; split the foresail. Midnight, ship under mizen trysail 

 and fore topmast staysail, incessant and increasing squalls, and sea 

 getting up from the SW. ; heavy rain. 



2Zrd September. — a« m. Blowing a tyfoon from SW, gusts tre- 

 mendous, and in rapid succession. Bar. fell from 29.40 to 28.80 in 



