' 
218 Dr. Hildreth’s Meteorological Journal of Marietta, Ohio. 
borders. The Marine Tertiaries are nearly limited to the shores 
of the present oceans, while the patches of strata of that age 
found nearer the centre of the continent are a all, so far as I have 
observed or heard, of fresh water or estuary origin. Between 
the western base of the Sierra Nevada and the Mississippi there 
are, I believe no Tertiary beds not of this character, and the lar 
ger part of the great central plateau has never been ‘covered with 
Tertiary or Drift sediments, but — since the close of the Cre- 
taceous epoch, been as now, dry 
The facts which I have ancneratee seem to indicate that over 
this ancient land the isothermal lines were curved much as now, 
and that during the Tertiary ages there was, perhaps, as great 
‘a difference between the climate of the Pacific and Atlantic 
water sheds as exists at present. 
ART. XXL — Abstract of a oe mr ak Joe ke ete at Marietta, 
Ohio: lat. 39°-25 N. and lon. 4°-28 W ington City; 
by S. 3 Hitpretu, M.D. Re 1859. Thirty therd annual 
Fepork ] 
THERMOMETER. | z : _ 
a aS 
1859. 3 a | 23 - 
ae | : P >| 2G 
§ |8|8/¢/8\lcs| Prevaili gl, 
worm | 5 B|ELE|EE2| “Wn” | 2] ale 
es — — te “74 2'o 4 = 5 
$2/3/8\5/2)/38 si z\s 
= =s ean 4 — 
= = si Ql meee 
j ae 85 28°95 0 
anuary, 33°00 63} 4) 17| 14) 310) w.,s 29-60 28°85 07 
February, 37°77| 62, 10 10| 18| 720) sw, &e. (290r Oe 
arch, 48°48) 77) 25) 19] 19) 5:08] sx, & Sw. [Oo og.as of 
April, 52-03} 83) 28) 14) 16) 6-46) nN. & 99-0) 29 10.0: 
a: 67°20) 90} 46 21, 10, 156, sw,&s. [e-, 
ne, 23| 93 17| 13) 462 eo 072199:20 0" 
July, ; 7423'102| 49| 23| 8} 108) x, sr, & or asiae ; 
A 72:10! 95| 46, 15) 16) 4-4 & 29°79 29°10, 
ptember, 63-51) 86 46 12, 18) 495 29-65 28°85 
October, 49°12) 79 26 17 14) 279, sw, & vw. 2868) 
November, 0 72 20] 20) 10] 20 » oe 675188" 
December, 30°48 71) 5) 12, 19] 517] es: 
Mean tor year, \53°38 | ain 48°55 i 
Remarks on the seasons.—The mean temperature for ‘for i‘ 
ued is 53°38, which is somewhat above the average 
ity. 
The amount of rain and melted snow is 48°55 inches. The 
Sally 40 a series of years, being forty-two inches, s, falling 
ye ae 
- ” ) , iD 
to thirty-two inches, an nd again rising, 8 re 3 
near sixty- — so that our climate i phen 
e — of cloudy days bear 
humidity of the year Be 
ES eae 
ee ek St re Ae SU EIME Ee eT ea Le ame Els SINE SER Silage en tet ie Se aati 
‘ 
| 
