57 



Slrogo ani ''ßolai^eobacDtitugeu —56°, 7; Wertet —60°; €aigco 

 burcb bie SBariue^fbiia&me in ber 3(rmci>()iire aus* 367 meiner 

 '-tfeobacrjüingen in ber 9lnbeäfette nnb in SOierico — 65 u , burcb 

 Ibermometer-- Weitungen am Montblanc nnb bei ber aeroftatifd)ew 

 Weife von @a»--2u(fac —77°; @ir 3obn /Knebel Edinburgh 

 Review Vol. 87. 1848 p. 223) — 132° %., alfo —91° Sein. 

 2ßie tyoifion, ba bie SWitteb Temperatur von 9)?elville--3nfel (Q3r. 

 74°47') fdjon —18°, 7 i\t, für ben QBeltraum attö rein tbeoreti-- 

 l'djen ®rünben, uad> benen ber 2ßeltraum warmer alä bie andere 

 ©renje ber Sltmofpbare fein foll (5 227 p. 520), nur - 13°, nnb 

 bagegeu spouiUet uad) actinometrifeben ^erfueben (Comptcs ren- 

 dus de l'Acad. des Sc. T. VII. 1838 p. 25-65) gar —142° 

 fiuben; mujj üßunber nehmen mib in bieten tnrereffanten £pecu-- 

 larioncn bat Vertrauen ju ben biäber eingetragenen 2Begen 

 miubern. 



29 (£>. 47.) ^oiffoti/ Theorie mnthem. de laChnleur 

 p. 438. Wad) ir)m bar bie (Srbärtung ber (Srbfcr/idjteu von bem 

 Öeurvuni angefangen, nnb ift von biefem jur £)berflad)e aUnuilig 

 forrgefebritten; 5 193 p. i-29. («Berg!, aud> .K o $ m o * $b. I. 

 6c 184.) 



60 (@. 48.) Äoämo$ 33b. I. ©. 86 unb 149. 



31 (<£. 49.) »Werc no atmosphere, ■ Ihermomeler, l'reely 

 exposed (at sunsel) lo the healing influence of ihe carlh's radia- 

 tion, and the cooling power of ils own into space, would indi- 

 cale a medium temperature belwecn that of Ihe celcslial Spaces 

 (—132° Fahr. = — 91° Cent.) and that of the carth's surface 

 below it (82° F. = 27°, 7 Cent, at the equalor, —3°, 5 F. = 

 — 19°, 5 Cent, in the Polar Sea). Undcr ihe equnlor, Ihen, it 

 would stand, on the nvernge, at —25° F. = — 31°, 9 Cent., 

 and in the Polar Sea at — 68° F. = — 55°, 5 Cent. The pre- 

 sence ol the atmosphere tends to prevcnl the Ihermomeler so 

 exposed from allaining thesc extreme low lemperaturcs: ürsl, 

 by imparting heat by conduetion; secondly by impeding radia- 

 lion oulwards.« ©ir 3ob,n jj>erfd?el im Edinburgh Review 

 Vol. 87. 1818 p. 223. — »Si la chaleur des espaecs planelaircs 

 n'exislait point, nolre atmosphere eprouverait un rtfroidisse- 

 ment. dont on nc peut fixer la limite. Probablernent la \ie 

 des planlos et des nnimaux serail impossible a la surface du 



