1851.] A Twentieth Memoir on the Law of Storms. 23 



27th.— Ditto E. S. E. to S. E. and S. W. and back to E. S. E. blowing 

 hard during the night. 



28^. — Blowing a hard gale with heavy showers, wind veering to S. W. hard 

 squalls. Gale breaks at noon from S. W. 



Total rain, 1 inch. 



Elevation of Pluviometer 4 ft. 



Abridged Log of the H. C. Surveying Brig Krishna, Lt. Fell, 

 I. N. Commander ; from the Island of Preparis bound to Calcutta. 

 Civil Time. 



On the 24th of April, the Krishna was at anchor off the Preparis, leaving it 

 at 8 a. m. and at Noon it bore S. 30 East, 10 miles. The weather was gloomy 

 with light and variable winds from N. E. to S. E. and South. Bar. at Noon 

 29.94. p. m. dark and squally to the S. W. squall rising with a remarkable 

 double arch,* and the rim well defined. Midnight fresh breeze E. N. E. and 

 gloomy with a swell from the South and lightning to the Eastward. Bar. 

 29.90 ; Ther. 83°. 



25th April. — a. m. to Noon moderate breeze E. N. E. to East, with passing 

 squalls and clouds passing from East to West with a long swell from S. S. E. 

 Lat. 16° 53|' N. ; Long. 92<> 14$' E. ; Bar. 29.86 ; Ther. 83$°. p. m. increas- 

 ing breeze East, but clearing a little to the South East ; a long increasing swell 

 from the S. S. E. ; at 8, dark threatening appearance to the S. Westward ; 

 Midnight, wind East, strong breeze with rain thunder and lightning. Bar. at 

 5 p. m. 29.74; midnight 29.79; Ther. 84°. Making preparations for bad 

 weather. 



26th April. — To Noon strong breeze East to E. S. E. to 10 a. m. when 

 S. East, and at Noon S. E. b. E. dark, gloomy looking appearance to the 

 Southward and S. S. W., with a heavy Southerly swell. Lat. Acct. 19° 19'; 

 Long, by Chr. 90° 15'; Bar. 29.80; Ther. 85°. p. m. strong breezes S. E. 

 at 7 p. m. ; and South, and at 5 p. m. E. S. E. moderate, at 9 hard squalls 

 heavy rain, thunder and lightning, wind S. E. during the squalls ; Clouds 

 flying very wild, the lower clouds moving East to West, upper ones South to 

 North. Midnight fresh gale E. S. E. and high sea. Bar. 29.78 ; Ther. 84°. 



27^ April. — a. m. fresh increasing gale E. S. E. with a high sea, rain, light- 

 ning and distant thunder. Wind hauling to S. E., S. S. E. and S. b. W. at 

 Noon; vessel having laid to at 3 a.m.; at Noon no observation. Bar. 29.69 ; 

 Ther. 84°. 3 p. m. saw the Station Pilot vessel, after which a few heavy squalls 

 till evening when the weather moderated. 



* These double arched squalls are often noticed in the Logs of ships on the 

 approach of Cyclones. 



