Encyclopaedia; or, A dictionary of arts, sciences, and miscellaneous literature; constructed on a plan, by which the different sciences and arts are digested into the form of distinct treatises of . hter than theoppofite one, fo the light of the diverging beamsougiit alio to be brighter than that of the conver-ging ones. For, though rays are reflected from roughunpolillied bodies in all pofllble directions, yet it isa general oblervation, that more of them are reflect-ed forwards obliquely, than are reflefled more di-reftly backwards. Befides, in the cafe, theincident rays u
Encyclopaedia; or, A dictionary of arts, sciences, and miscellaneous literature; constructed on a plan, by which the different sciences and arts are digested into the form of distinct treatises of . hter than theoppofite one, fo the light of the diverging beamsougiit alio to be brighter than that of the conver-ging ones. For, though rays are reflected from roughunpolillied bodies in all pofllble directions, yet it isa general oblervation, that more of them are reflect-ed forwards obliquely, than are reflefled more di-reftly backwards. Befides, in the cafe, theincident rays upon the oppofite region to tlie fun,are more diniinillied by continual reflectims fr(m alonger tract of the atmofphere, that the incidentrays upon the region next the fun. 241 The common phenomenon of diverging beam:, I Tlicihsno- think, is more frequent in fummer than in winter, and • \r \ iri - . diTcr^in^ alio when the fun is lower tnan wnen higher up ; pro-i,^,^^,,,,^^, bably becaufe the lower vapours are deufer, and there- frtqu. nt ia fore more ftrongly refledive than the higher; be-fmim^r citife the lower fky-light is not fo briglu as the up-per J thtii in J^ O P i 1 ( s. Part II. O I S.
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Keywords: ., bookcentury1700, bookdecade1790, bookidencyclopaedi, bookyear1798
