15-J. 



NOVTM OIUIAXUM. 



fipproximatur, cxistimantur tcrvores soils .iiigoro ct in- 

 tcndcrc ; ut fit cum sol sistitur in leono, ot diebus ca- 

 nicularibns 39 . 



. It/ scciuidam. 



&amp;lt;2. Radii solis in media (quain vocant) rcfjione aeris 

 non calet aeiunt; oujus ratio vuljrn 11011 male rodditur ; 

 quia re^-io ilia nee satis appropinqnat ad corpus solis, 

 undo radii omanant, nee etiain ad terrain, undo rotlcc- 

 tuntur 10 . At(juo hoe liqnet ex tastigiis montiuni, (nisi 

 sint pra-alti) ubi nives perpetuo durant. Sod contra 

 notatuin est a noimullis. (|uod in cacumino Picns do 

 Tenaripli, atquo etiain in . \ndis IVruvia-, ipsa fiistigia 

 inontiuin nive destituta sint; nivibus jaccutibus tan- 

 tiun inferius in asccnsu 41 . Atcpio insupor ai-r in illis 



count for this phenomenon. 



Tlu- Solar Kay lias horn analysed 

 carefully, and is found to he divisi- 

 hie into three distinct kinds of 

 heanis ; ( i ray- of Heat not lumi- 

 nous, (2) rays ofli^ht not hot, and 

 (3) the actinic rays, which alone 

 produce those chemical results upon 

 silver and other suhstances, which 

 are .applied in Photography. 



41 These extreme heights may 

 not he snow-clad, hut if so, only 

 hecanse there is not a sufficiently 

 level surface for the snow to rest. 

 The helief as to the stillness on the 

 summit of Olympus is to be found 

 in Homer. 



H fuV &amp;lt;&quot;/) &amp;lt;&amp;gt;r fiVofrr uTrffir] y\&amp;lt;n KwTTis \6rivr) 

 OvXvp-rruv fi , ofli (j)acr\ 6(a&amp;gt;v efioj ncr^aXts aid 

 fjifi.vai OUT (ivffjLoicri rivvtrcrfTni, ovrt TTOT (&quot;pdpai 

 ftfi fTai, oi Tf xiu&amp;gt;v tiriiri\varai dXXa fj.( i\ uiofir) 

 TTfirTarai dvv(&amp;lt;p(\ns, Xfi /cr; fi eVi88po/i*J atyXr;. Od. VI. 41. 



So too Lucan, Phars. II. 269- est in cacumine Jovi dicata, cujus 



273. But the authority whom Ba- altaribus signa de extis inferuntur, 



con must have had before him was nee difflantur ventosis spiritihus, 



Solinus, Polyhist. chap. xiii. &quot; Ara nee pluviis diluuntur, sed volvente 



:) - I his is crrnin ous: the tivi d 

 star- have no inlliu-ncc of tlu- kind ; 

 and the cause of the increased Heat 

 of the sun in Leo, or in the I )x- 

 days, arises from the an^le at which 

 the Karth s Axis is inclined, and 

 from the Heat increasing to a maxi- 

 mum after the Sun has pa^ed the 

 Summer SoKtice. &quot; Sol iis ;ppnxi- 

 matnr&quot; is lan&amp;gt;nia&amp;lt;re connected with 

 the belief that the Sun and the Stars 

 are equidistant from the earth. 



*&quot; Accounted for hy the Karefac- 

 lion of the Atmosphere as we 

 ascend, which proceeds hy a direct 

 ratio as the pressure decreases, 

 Reflection of Rays is also a cau-e of 

 additional Heat, hut does not ac- 



