41 8 Meteorological Ohfervalions made at Padus. 



meteFj and it remains almoft always ftationary. It appears 

 that it rofe very nnich after the fog, of which I (hall foon 

 fpeak. 



Thermometer. — ^The month, in general, was cool: 

 its mean heat, which commonly is 19 or 20 degrees, was 

 this year only 16^; for in the latter part of the month the 

 thermometer did not rife above 22*6, and in the beginning 

 it was at 10. I fliall obferve that it fell fonr degrees between 

 the 16th and 17th, owing to a fl*-m which came on. 



Hygrometer. — Notwithdanding the rain, it always 

 pointed to drynefs; which proves the exaltation of the va- 

 pours-. 



Rain. — If we confidcr the days when it rained little or a 

 great deal, we ought to fay that the month was extremely 

 rainy, for it rained twenty-two days : but the rain in ge- 

 neral was not abundant, as there fell two inches Icfs of 

 water than ufual. This obfervation is applicable only to the 

 level country ; for in the mountains the rain was exceffive, 

 and occafioned a very great fwell in the rivers and torrents. 



But there occurred two particular phenomena to be ob- 

 ferved, viz. the fog and thunder. On the morning of the 

 18th, after a ftorni, which had been preceded by feveral 

 others, the fun appeared extremely pale through a light fog, 

 which filled the whole atmofphere. This fog became ftill 

 more condenfcd the following days ; and was not diflipated 

 by the winds, nor even by the ftorm of the 26th in the morn- 

 ing, accompanied by a great deal of thunder, which was 

 heard all alon;^ the direction of the mountains from one fea 

 . to the other. This fog ftill exifted in the beginning of July, 

 and feemed to become thicker, at leaft at certain hours. 

 It did not prevent the fun or ftars of the firft magnitude 

 from being fecn, except in the lower part of the horizon^ 

 People could look at the fun without being incommoded, 

 and witkout ufing coloured or fmoked glafs. It appeared of 

 diflcrent colours, according to the kind of rays which the 

 tiiflerence in the dcnfity of the fog fullered to pafs. As the 



yellow 



