Church —Underground Temperatures on the Comstock Lode. 295 
Engineers, these a are given as 10°56° F. and 7-87° F 
the fact that they were the average 
the difference e being du 
of seven instead of nine io as observations. 
Yellow Jacket Mine.—Morning Temperature, 6 A. M. 
Surface. | 1119 feet. 1782 feet. 1900 feet. 2040. 
8S. Winze.|N. Winz Winze,|S. Winze.|N. Winze. 
, 1876, ..-. 59°27° | 80°23° | 92°99° 
January, 1877,._- 52°55 | 73°42 | 86°90 85°35° | 93°22° 
ebru iad es 49°75 | 76°99 | 83°71 6°59 | 93°99 
March, cee 53°81 | 78°13 | 89-20 | 90°29°| 83-68 | 94-99 
April, rhe 49°87 | 77-40 | 88°13 | 89-97 ‘90 | 93°77 
May,  __.|(44-48°)] 53°77 | 83-42 | 90-45 | 90°99 | 83°39 | 93°61 
June, « ___.| 56°07 | 57-40 | 79°39 | 91-47 | 93°27 | 88-26 | 93°63 
po : oie (84-00 94-0 
ugust, a NE (83°23) 94-5 
September, “ ____] 56°67 | 60°80 | 81°86 | 91°67 | 96°60 | 88°37 | 92°13 
ber, “ ____| 46°10 | 55°13 | 73°65 | 90-44 | 92°07 | 83-23 | 88°36 
treme « .---} 39°90 (76°53) 88°50 | 81:27 | 87°23 
mber, 4 5°84 
January, | 1878,___-| 33°39 
Februa Lamers 3°93 
Mare Dre era ey. 
April, ee 
pat one ST 
hbk. Sc eee 43°52 | 64°71 | 78°28 “48 | 92°25 | 85°11 | 92°33 
he taken, 22 5,1 10 mo’s.} 9 mo’s.| 9 mo’s.| 9 mo’s.| 9 mo’s.| 9 mo’s.! 9 mo’s. 
Yellow Jacket Mine.—Hvening Temperatures, 6 P. M. 
Surface. | 1119 feet 1782 feet. 1932 feet. 2040 feet. 
S. Winze.|N. Winze.|N. Winze.|S. Winze.|N. Winze. 
deste TG SA ed aloe od 
December, dE hoy. 59°20° | 80°84° | 90-92° 
ry 1877, 50°77 | 77°82 | 86°10 83-23° | 93°36° 
Febru he 76°71 | 84:03 86°82 | 93°43 
March, Be ae 55°52 ie 07 | 88°58 | 90°29°| 86-68 | 95-00 
April, ae a ae 52°83 | 77°57 | 88°33 | 89°93 | 85°87 | 93°80 
ay, & __ | 10°4%° | 61°50 it 91°77 03 | 87-16 | 93°48 
June, « """"| 70-33 | 61°50 | 79°40 | 91°77 | 93°03 | 88:20 ; 93°73 
red : Ue ee 84°16) 94°29 
us coent 42 94:2 
September, “ ____| 69°13 | 62°76 | 81°82 | 91°11 | 96°67 | 87-90 | 92°00 
October, « ____| 54°55 | 57°30 Cs 99 | 91°00 | 92°10 | 83°32 | 88°58 
ee, | 45°43 (17°40) 89°50 | 81-13 | 87-23 
Decem “ ____| 39°58 
January, 1878,.___| 38°84 
Heh & = 37°61 
April, er pre 
May, Mean SOE | 
cheep oe ee 53°09 | 57°67 | 77°85 | 89°30 | 92°57 | 85-60 | 92°28 
Time taken,..______ 11 mo’s.| 8 mo’s., 9 mo’s.| 9 mo’s.; 9 mo’s.| 9 mo’s.| 9 mo’s. 
verage, morning 
bral. 2 48°30 | 5619 | 78°06 | 89°39 | 92°41 | 85°35 | 92°30 
No. 100.—APRIL, 1879, 
Am. Jour. Scz. Sicha waar Vou. XVII, } 
