[ 99 3' 



" January the 13111 at night, and 14th in the rnqmiag, the 

 Thermometer funk for fonie hours below twenty-feven, and 

 did not rife during fix teen hours above twenty-eight. The 

 water in the veffel A, remaining after the foregoing congela- 

 tions, was frozen to the thicknefs of a quarter of an inch in. 

 the centre, and three quarters of an inch in the circumference, 

 but no ice was formed at any greater depth in the water. This 

 ice, like the former, was laminated, and when bruifed and warned,, 

 it formed frefh water to the quantity of three pints. 



" On the fame day, viz. 14th of January, in the morning, 

 the Thermometer pointing below twenty-feven, the Thames 

 water in the great jar was frozen to the thicknefs of three or 

 four inches, if not more, contiguous to the jar and the furface. 

 The diftilled Thames water iii the other jar was frozen to the 

 thicknefs of two inches, or thereabouts, and contiguous to the 

 jar and furface of the water; and the fea-water in the glafs body 

 marked B was for the firft time frozen. On the furface, and hi 

 the center of this furface, the ice was half an inch thick ; at the 

 circumference it was an inch thick ; and from the circumference 

 and furface the ice formed contiguous to the glafs, in fuch a 

 manner, that the craft was an inch thick near the glafs and 

 furface, but, as it proceeded downwards towards the wider part 

 of the glafs, it tapered to an edge, terminating within an inch 

 of the bottom of the veffel. 



" Thus all the ice was formed on the furfice and contiguous 

 to the glafs, and was thickeft where the yeflel was narrowed:; 

 that is, the quantity of ice was inverfely as the diameter of the 

 veffel. This ice refembled that obtained in the (hallow veffel in 

 its laminated ftructure and fpongiuefs, and in its enveloping a 

 portion of the lalt-water, with this difference only, that the 

 laminae (hot vertically, and from the circumference inclining tp- 



O 2 wards 



/ 



