154 



EXPERIMENTS and OBSERVATIONS 



DECEMBER 30. 1783. 



THIS night the thermometers were affected ftill more remark- 

 ably by the viciffitudes of the atmofphere, the fnow not only 

 acquiring the fame temperature as the air, when the heavens 

 were overcaft, but thereupon becoming confiderably warmer. 

 This fingular reverfe will be found in the following regifter : 



THE fnow fcale, expofed from nine o'clock till eleven o'clock 

 and twenty minutes, gained two-tenths of an ounce of weight. 



THE fame, when expofed from the time laft mentioned till half 

 paft one in the morning, loft .07 of an ounce. 



WITH 



