212 Meteorological Journal at Marietta, Ohio, for 1846. 
Conclusion. 
ced ch latent power of hybridity exists in many animals in the 
wild state, in which state, also, hybrids are sometimes produced. 
2. Hybridity oceurs not only among diflerent species, but 
among different genera ; and the sentitet have been prolific 
in — cases 
. Domestication does not: cause this faculty, but merely 
evolves itae es 
4. The capacity for fertile hybridity, ceteribus paribus, exists 
in pees in proportion to their aptitude for domesticity and cul- 
tivation. 
5. Since various different species of animals are capable of 
producing together a prolific _— offspring, hybridity ceases 
to be a test of specific affiliatio 
6. Consequently, the mere fact that the several races of man- 
kind produce with each other, a more or less fertile progeny» 
constitutes, in itself, no proof of the unity of the human species. 
Arr. XXIV.— Abstract of a Meteorological Journal, for the year 
1846, kept at Marietia, Ohio, Lat. 39° 25’ N., nee ng. 
4° 28! W. of Washington City; by 8. P. Hitprern, ti D. 
JHEPMOMETED: a BAROMETER. _ | 
é Es 
° 
MONTHS. g _| .| 8) 8%! Prevailing winds. : 
fei ele\= = eS 
gp ab = = § e 
Sto 8 }o1s 3 EB jog 
= |e\ele (Oo! Se 
January, > 33+( 13) 18 » (Qe £98 208 0 
February, - 9 Sh: 14) 14 0) 28-95 0-95 
March, - - (43% 13) 17) 14 20-70 29-00 0-74 
April, = ~<or 24, | 85/2918 0-67 
4; ee 37| 1 29-53, 29-10 0-4 
June, - - (67-00 64) 44) 1 29-62| 29-25 0-t 
July, = re 49) 29-65 29-25 0-4 
August, -  - |74 56) $ 29-55 29-28 0-8 
September, - (6983 90) 43) § 29-60) 29-20 0-4 
tober, - [5266 79) § 29-75 29-10 0-€ 
November, - (46 re] 29-80 29-12 0-€ 
December, - (37°77 65 14 - 29-95 '29-10 O-€ 
~ Mean for year, 53°64 Be r 
Remarks on the year 1846.—The mean temperature for the 
year is 53°64°, which is greater by about one degree than that of 
845, and considerably above the mean temperature for this place. 
The mean of the winter mouths is 29°91°—spring 53-22°—sum- 
mer 71-05°—autumn 56-279. 
