916 Eighteenth Memoir on the Law of Storms. [Sept. 



the Light Vessel at noon of the 12th, so as to get 100 miles of run 

 before midnight. It will be seen by taking this in the compasses that 

 steering to the S. S. W. and S. W. by S. it will take her between the 

 Point and the centre, and at a distance of 45 or 50 miles from this last, 

 and then enable her to bear away to the S. W., so that she will quick- 

 ly run into the moderate weather, and can gradually haul up to the 

 Southward, Eastward, and Northward back to the Light Vessel again, 

 if the weather is fine enough. Every seaman will of course see that 

 this is a question of rate of sailing, and above all of steering so as to 

 avoid broaching to ; but that even if he should be disabled (which he 

 might equally be in lying to) he will still here have Northerly winds 

 and a clear drift to sea, while on the Northern side of the Cyclone 

 track he would be drifting on to a lee shore with Easterly and S. 

 Easterly winds. The examples of the Forth, which vessel I take to 

 have been at one time within 20 or 30 miles of the centre, and of 

 the Collingwood while overrunning the Cyclone, are instances of what 

 may be done by good steering ships even in the very height of these 

 fearful tempests and close to the centre, and the Fattle RozacKs man- 

 agement is a good instance of passing a Cyclone at a reasonable distance 

 with a heavy sailing ship. 



In some instances, as in the Coringa Cyclone of Nov. 1839, which 

 forms the subject of Part II. of my second memoir (Journal Asiatic 

 Society, Volume IX.) it has occurred that a Cyclone travelling from 

 the Andamans to Coringa was so far felt as a heavy Easterly and E. S. 

 Easterly gale at the Sandheads, that for some days it was imprudent 

 to approach the station, and all vessels were warned to sea. But in 

 this and all similar cases of distant Cyclones the Barometer is the guid- 

 ing indication, and in this instance the Barometer was at 29* 92' to 

 29* 95' at the Light Vessel. 



In my third memoir, also (Journal Asiatic Society, Volume IX.,) we 

 have an instance which might appear to create a difficulty, *. e. a Cy- 

 clone travelling across the Bay from the Andamans, first towards the 

 Coromandel Coast, on about a N. W. by W. course, or towards that 

 part of it lying between Ganjam and Bimilipatam, but on its approach 

 to about the Meridian of the Light Vessel curving to the N. W. by 

 N., so as to " land" between the Black Pagoda and Juggernaut, giving 

 the Light Vessel and ships at the Sandheads a heavy Easterly and 



