II S Ohfcrvaihns on the 



dew, with the wind and the cdd which accompany ihc-m 5 

 but a few remarks are flill neccflary to complete the defcrip- 

 tiofj. We fliall firll ohfcrve, that the dclccnding cunciiU 

 are prolonged until the refinance of the air which they tra- 

 verfe has entirely deftroyed their motion. Befides, we fliall 

 fee direfily under the fun a circuUir fpace very much heated, 

 and which does not exhihit to the inhabitants of that part of 

 the^carth the phenomenon we are attempting to dcfcrihe. 

 Leaving this part, in proportion as the fun appears in a more 

 d)lique pofition, wc fhall arrive at a region of Icfs heat, 

 where we thall begin to perceive a wind coming from the 

 quarter of the fun, accompanied with a precipitation ol 

 w-ater. This region forms a ring around the circular fpace 

 before mentioned. In a word, bv removing from the internal 

 tdge of this ring, the wind is found ftronger, the cold more 

 {enlible, and the precipitation of water more abundant: ef- 

 fcfts which ftill decreafe at a certain didance, and ceafe en- 

 tirely on that part of the earlh diametrically oppofite to the 

 fun. 



Thus, according to the hypothecs of the immobility of 

 our globe in regard to the fun, there would be on that planet 

 a very extenfive region continually ful)je<ht to the phenome- 

 non of morning and evening dew. Either of thcfe expref- 

 fions will denote the phenomenon according as the obfcrver 

 fuppofe? hi mfelf placed to the eaft or weft of the fun, fmce 

 the one takes place at the rifing of that luminary, and the 

 other at his fetting. 



Let ns now return to the real ftate of things, and reftore 

 to the earth its diurnal rotation. In that cafe it will fuc- 

 ceflively prefent different parts of its furface to the pheno- 

 mena above defcribed. Thofe who inhabit that part where 

 the fun lis defcending towards the horizon, will foon fee the 

 evening dew appear, accompanied wi'th a frt-ilieningeail wind; 

 thty will fee thefe phenomena mcreafe more and more until 

 after funfet, when the effed will be diminiflied, and at lall 

 ccafe altogether. During the night the moifture depofited 

 by the evening dew will be evaporated, if the atmofphere be 

 not already too much charged with water, and no traces of 

 it will remain. Next morning at break of day, the pheno- 

 menon 



