XIX. Journal of a voyage to the East Indies, in the ship Grenville, Captain Burnet Abercrombie, in the year 1775

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Abstract
1st, The date . 2d, The height of the thermometer , according to Fahrenheit's scale. This thermometer belonged to Mr. Russell, and hung in the open air in the balcony. 3d, including four columns, contains the register of the marine barometers , all of which, as well as the thermometers, were made by Nairne and Blunt: those marked R and D are quicksilver, of the kind usually made by them. That marked S is compounded of quicksilver, and of a lighter fluid, for the purpose of making the alterations more visible, which is a very great convenience at sea; a quicksilver thermometer being fixed to it for the sake of correcting its height, the heat by which is set down in the column marked Th. next to that marked S. 4th, The weather and winds in four lines; 1ft line from noon to 6 P.M.; 2d, from 6 P.M. to midnight; 3d, from midnight to 6 A.M.; 4th, from 6 A.M. to noon. In the column of weather , f. denotes fair ; sq. squally ; c. cloudy ; h. hazy ; r. rain ; hr. hard rain ; sr. small rain ; dr. r. drizling rain ; sh. showers ; th. thunder ; l. lightning . It is proper to remark, that the winds are set down according to the compass , without any allowance for the Variation . 5th in 2, The difference between the daily alteration of latitude by account and observation ; N. denoting that the observation was to the Northward of the account ; S. that it was to the Southward .

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