32 Seventeenth Memoir on the Law of Storms. [Jan, 



bore North, the wind being about West and hauling rapidly to W. S. W. 

 and to S. W. at 8 a. m. where it continues to noon. We have it thus 

 between noon 24th and 25th coming down upon her from the N. E. 

 and passing her close to the Northward of her line of drift. If we 

 take her Bar. at lOh. a. m. of the 24th to have been within the influ- 

 ence of the Cyclone, we find that it fell (from 29.99 to 29.16) 0.78 in 

 the 25 hours from lOh. a. m. to noon of the 25th, or at a mean rate of 

 0.15 per hour, which would give a distance at the mean of the time, or 

 say at about midnight, of 50 miles only from the centre, and this I have 

 taken as the best datum we have, though we cannot be assured that the 

 fall of the Barometer was at a regular rate. The succeeding rapid 

 veering of the wind shews however, as above remarked, that the vessel 

 was very close on the centre. 



We next find that from noon of the 25th to that of the 26th the 

 wind, not hauling to the W. S. W. and S. W. and then gradually to S. 

 E., which it should have done if the Cyclone had had a track to the 

 S. Westward so as to have brought the wind to S. E. at about noon 

 on the 26th*, but that after coming to S. S. W. at p. m. on the 25th, it 

 remains at that point and to S. W. b. S. at noon on the 26th, evidently 

 showing that the centre was now bearing to the N. W. b. W. of the 

 vessel, and had thus, from some unknown cause, curved away to the 

 Northward and Westward instead of continuing its straight track to the 

 S. Westward, for the whole of the day of the 26th-2/th to noon of the 

 28th, we find that it continues at S. W. and S. W. b. S. though 

 abating a little, the Barometer having risen 0.06 only on the 24th ; 

 not improbably from the influence of the coast Cyclone, of which we have 

 the newspaper notice previously quoted, for we find that the threatening 

 appearances continue with her from N. W. (her own Cyclone) to N. E., 

 that of the coast of China. 



On the 28th, though we find " the appearances were that the wind 

 was coming from the N. E," i. e. that there was probably a heavy 

 bank in that quarter, yet the Mischiefs Cyclone ended in a hard gale 

 from the westward, gradually moderating after noon, but the Baro- 

 meter between the 27th-29th rising 0.06 only, as before. I have laid 

 down its track as curving away and travelling off to the N. Westward 



* For we have always the vessel's position carefully given, and moreover worked 

 up at the time, which is far more to be depended upon than after estimates. 



