THE FROST FACTOR. 



149 



practice should be with refenece to frost occurrence, it 

 still remains with the latter to do all that he can to under- 

 stand his immedate spot of land through the teaching of 

 his own observation and experience. 



DATES OF SPRING AND FALL KILLING FROSTS, 1897 TO 1908. 



Location and county. Elevation. 



UPPER COAST REGION. 



Crescent City, Del Norte 50 



Eureka, Humboldt 64 



Upper Mattole, Humboldt 244 



Ukiah, Mendocino 620 



Fort Bragg, Mendocino 74 



Fort Ross, Sonoma 100 



Cloverdale, Sonoma 340 



Santa Rosa, Sonoma 181 



Peachland, Sonoma 220 



Sonoma, Sonoma 30 



Calistoga, Napa 363 



Napa, Napa 60 



Upper Lake, Lake. . : 1350 



SACRAMENTO VALLEY AND 

 FOOTHILLS. 



Redding, Shasta 552 



Red Bluff, Tehama 307 



Rosewood, Tehama 865 



Corning, Tehama 277 



Chico, Butte 193 



Durham, Butte 160 



Biggs, Butte 98 



Oroville, Butte 250 



Palermo, Butte 213 



Fruto, Glenn 624 



Willows, Glenn 136 



Dunnigan, Yolo 65 



Guinda, Yolo 350 



Woodland, Yolo 63 



Davis, Yolo 51 



Vacaville, Solano 175 



Elmira, Solano 75 



Suisun, Solano 20 



Sacramento, Sacramento 35 



Folsom, Sacramento 252 



Wheatland, Yuba 84 



Auburn, Placer 1360 



Colfax, Placer 2421 



Eldorado, Eldorado 1609 



Placerville, Eldorado 1820 



Georgetown, Eldorado 2650 



Nevada City, Nevada 2580 



North Bloomfield, Nevada 3200 



Jackson, Amador 1900 



Latest 

 spring. 



June 19 



May 1 



Apr. 26 



May 2 



Mar. 18 



Mar. 21 



Mar. 25 



May 10 



Apr. 11 



Apr. 12 



May 1 



Mar. 30 



Apr. 23 



Earliest 

 autumn. 



Sept. 30 



Nov. 7 



Oct. 20 



Oct. 16 



Nov. 5 



Dec. 18 



Nov. 2 



Oct. 29 



Oct. 18 



Dec. 2 



Oct. 1 



Nov. 7 



Sept. 29 



