1.5() NOYl M ORUAMJM. 



tur parum posse, etiam super ternuii planain ; nee re- 

 llexi etiani, nisi inultiplieentur et uniaiitur, quod fit, 

 cum sol majris vcr^it ad perpcniliculum ; quia turn in- 

 cidentia radiorum tacit angulos aeutiores; ut linea&amp;gt; ra- 

 diurum sint Hindis in propinquo : ubi contra in inarms 

 ol)li(|uitatil)iis solis. anguli Mint valde obtusi. ct proiiule 

 linete radiorum magis distantes 4:i . Sed interim notan- 

 dum i-M. multas rsse posse opcratioucs radiornm solis, 

 atquc etiam ex natnra calidi. qu;e non snnt proportio 

 nate ad tacttim nostrum: adeo nt respect u nostri non 

 oprivntiir us&amp;lt;|iic ad calefactionem, sed respectn alioruin 

 nonnullorum corporuni cxcquautur opera calidi. 



I &amp;lt;l secioidnin. 



4. l- iat Imjusmodi I xperimcntum. Accipiatur spe 

 culum tal&amp;gt;ricatum contra ac lit in speculis comburenti- 

 lus; t-t intfrpoiiatiir inter manum et radios solis; et 

 fiat olxt-i-Natio, iitrum minuat calorcm solis, qucmad- 

 modum speculuin combnrons eundfin au;-ft et intendit. 

 Manit estum cst fiiim quoad radios opticos, prout iabri- 

 catur speculum in dc-nsitate iiia (juali respectu medii et 

 lateruin, ita ap]&amp;gt;arere simulacra ma^is diil usa, aut inagis 

 Contracta. Itaque idem videndum in calore n . 



Ad &amp;gt; 

 5. Fiat experimentum diligenter, utruni per specula 



** The rays liavi- a U&amp;gt;s amount iiiyslcry which every discovery that 



of atmosphere to traverse when the has been made either in chemistry 



Sun is in zenith; and what re- or optics, so far from elucidating, 



flection there is is most direct. Hut si-ems only to render more pro- 



the question of Solar Heat is in it- found.&quot; 



self very obscure, und but little un- 4l This can be verified. Solar 



derstood. Ilerschel s Disc, on Nat. Rays naturally increase or decrease 



Phil. 347. &quot;The nature of the the amount of Heat generated at a 



Sun, and the mode in which its certain point according to the num- 



wonderful supply of light and heat ber of them (if one may so speak) 



is maintained, are involved in a brought to bear on that point. 



