10 



An Eleventh Memoir on the Law of Storms in India, being the 

 Stromsin the Bay of Bengal and Southern Indian Ocean, from 26th 

 November to 2d December ■, 1843. By Henry Piddington ; with 

 a Chart. 



In this memoir, for much of the material of which I am as usual 

 indebted to the zealous exertions of Capt. Biden, Master Attendant of 

 Madras, we have the advantage of tracing at the same time storms 

 raging on the North and South sides of the Equator, of having a re- 

 gister of the weather almost upon the Equator while the storms were 

 blowing on both sides, and finally of tracing with abundant data in the 

 dangerous " Storm track" (as I have called it in another publication,)* 

 extending from 5° to 15' South and from 75° to 90' E. a most severe hur- 

 ricane, and this investigation has moreover developed a new feature in 

 these storms, viz. that there are some which are comparatively station- 

 ary ! having but an exceedingly slow progressive motion ; and should 

 this be found by future research to prevail frequently, it will be of im- 

 portance both in our theoretical and practical views of storms. It will 

 be found in the postcript to the Memoir that after this was sent to the 

 press I obtained from the Mauritius, the details of a storm there, in 

 which a vessel, the Charles Heddle, was fully proving for us by what 

 I may call a beautiful experiment, the truth of our researches here ! 



I have as usual first given the documents carefully abridged, then a 

 Tabular view of them for each hemisphere, a summary of the grounds 

 from which the positions of the centres of the storms on different days 

 are developed, and finally a few remarks on the whole. 



Copy of Report kept at the Master Attendant's Office Madras, from 



Captain Biden. 



Barometer. 

 8 a.m. 4 p.m. 10 p.m. 

 30th November 1843.— 6 a. m. North West wind, North 

 current strong and high surf. 7 a. m. North West 



wind, current very strong, high, and irregular surf, .. 30.012 29.925 29.997 

 1st December 1843.— 6. a. m. North West wind, North 

 current, strong, high and irregular surf no boats or Cat- 

 tamarans could cross the surf. Rain, 29.984 29.877 29.953 



* Horn Book of Storms p. . 



