94 QAZETTEER OF COLORADO. 
Atlas sheet. 
Jamestown; village in Boulder County; population in D00, 
164; altitude, 6,920 feet Boulder. 
Janeway; village in Pitkin County on Crystal River Railroad; 
altitude, 6,697 feet, 
Jansen; station in Las Animas County on Atchison, Topeka 
and Santa Fe Railway; altitude, 6,166 feet. 
Jarosa; canyon in Las Animas County, through which flows 
a left-hand branch of Apishapa River Spanish Peaks. 
Jarre; creek in Douglas County, a left-hand branch of Plum 
Creek, tributary to South Platte River Platte Canyon. 
Jason; station in Lake County on Denver and Rio Grande 
Railroad. 
Jasper; village in Rio Grande County. 
Jay; creek in Delta County, a right-hand branch of North Fork 
Gunnison River. 
Jay; village in Ouray County. 
Jefferson; county in the central pari of the State; bounded 
on the north by Boulder County, on the east by Adams, 
Arapahoe, and Douglas counties, on the south by Douglas 
and Park counties, and on the west by Park, Clear Creek, 
and Gilpin counties. It lies mostly in t he foothills of Front 
Range, including in the northeast a small area of high rolling 
plain. The area is 840 square miles, of which 11 per cent, 
or 61,224 acres, were under cultivation in L900. The popu- 
lation in L900 was 9,306, and of Golden, the county seat, 
2,152. In 1900the average magnetic declination was 13° 25' 
east. The mean annual rainfall is about L 5 inches, and the 
mean annual temperature 45° to 50°. 
Jefferson; creek in Park County, a left-hand branch of Tarry- 
all Creek. 
Jefferson; post village in Park County on Colorado and 
Southern Railway; altitude, 9,500 feet. 
Jefferson; station in Teller County on Colorado Springs ami 
Cripple Creek District Railway. 
Jenks; gulch in Boulder County, tributary to Jim Creek Boulder. 
Jenny Branch; in Las Animas and Bent counties, a right-hand 
branch of Muddy Creek, tributary to Arkansas River Iligbee. 
Jerome; peak in Pitkin County. 
Jim; creek in Boulder County, a right-hand branch of Left- 
hand Creek, tributary to South St.Vrain Creek Boulder. 
Jim; creek in Saguache County, a left-hand branch of Saguache 
River. 
Jimmy; creek, in Larimer County, a right-hand branch of 
Laramie River. 
Jimmy Camp; creek in El Paso County, a left-hand branch of 
Fountain Creek, tributary to Arkansas River Colorado Spring^ 
Jimmy Camp; station in El Paso County on a spur of Colorado 
and Southern Railway Colorado Spring 
Jimtown; village in Mineral County. 
John; lake in Larimer County. 
Johnny Bull; creek in Dolores County, a left-hand branch of 
Dolores River Rico. 
