164 



ENVIRONMENTAL CONDITIONS. 



Table 2. — Frost data and length of average frostless season for 1803 stations in the 

 United States. (Plate 34.) — Continued. 



Station. 



Altitude. 



No. of 

 years of 

 record. 



Average date of — 



Last frost 

 in spring. 



First frost 

 in autumn. 



Length of 

 average 

 frostless 

 season. 



California — Continued: 



LaPorte (15) 



Lemon Grove (14) . . . . 

 Lick Observatory (14) . 



Livermore (H) 



Lodi (14) 



Los Angeles (14) 



Los Gatos (14) 



Manzana (14) 



Menio Park (14) 



Merced (14) 



Mills College (14) 



Milo (14) 



Milton (n) (14) 



Mokelumne (14) 



Monumental (16) 



Mt. Tamalpais (16) . . . 



Napa (16) 



Nevada City (15) 



Niles (14) 



North Ontario (14) ... . 



Oakland (14) 



Ontario (n) (14) 



Orleans (16) 



Palo Alto (14) 



Paso Robles (14) 



Peachland (16) 



Placerville (14) 



Porterville (14) 



Poway (14) 



Red Bluff (15) 



Redding (15) 



Redlands (H) 



Sacramento (15) 



Salinas (14) 



San Ardo (14) 



San Francisco (14) ... . 



San Jacinto (14) 



San Jose (14) 



San Leandro (14) 



San Luis Obispo (14) . . 



San Miguel (14) 



Santa Barbara (14) . . . 



Santa Clara (14) 



Santa Cruz (14) 



Santa Margarita (14).. 



Santa Paula (14) 



Santa Rosa (16) 



Sisson (15) 



Soledad (14) 



Storey (14) 



Summit (15) 



Susanville (15) 



Tehachapi (14) 



Tracy (14) 



Tulare (14) 



feet. 

 ,000 



600 

 ,209 



485 

 35 



293 



600 



,870 



64 



173 



200 

 ,600 



660 

 ,550 



,375 

 20 



,580 

 87 



,750 



36 



860 



1 



70 



800 



190 



,820 



461 



460 



307 



552 



,352 



71 



40 



236 



207 



,550 



95 



50 



201 



616 



130 



90 



20 



996 



350 



181 



,555 



188 



296 



,017 



,195 



,964 



64 



274 



May 30 



Feb. 22 



Mar. 28 



Feb. 23 



Mar. 12 



Jan. 27 



Jan. 22 



Mar. 25 



Jan. 

 Apr. 



Jan. 

 Apr. 



22 



7 



Jan. 30 



Feb. 16 



Feb. 8 



Mar. 21 



May 30 



Mar. 3 



Mar. 20 



May 8 



Feb. 11 



Mar. 14 



Jan. 7 



Mar. 7 



Jan. 29 



Feb. 19 



Apr. 1 



Apr. 14 



Mar. 15 



Feb. 7 



Jan. 26 



Mar. 27 



Feb. 20 

 Feb 

 Feb 



Feb. 18 



Mar. 3 



Jan. 25 



Mar. 27 



Feb. 6 



Mar. 9 



Mar. 3 



Feb. 22 



Jan. 19 



Feb. 27 



Mar. 10 



Feb. 15 



19 

 16 



23 

 24 



Mar. 19 



Feb. 9 



Feb. 23 



Feb. 13 



May 10 



Mar. 17 



Feb. 17 



Mar. 7 



Oct. 

 Dec. 

 Oct. 

 Dec. 

 Nov. 



Dec. 

 Oct. 

 Dec. 

 Dec. 

 Oct. 



9 

 10 

 11 



2 

 16 



Dec. 27 

 Dec. 14 



16 



24 



3 



4 



Oct. 

 Dec. 

 Dec. 

 Dec. 



Nov. 29 



Nov, 29 



Dec. 15 



Oct. 16 



Dec. 13 



Nov. 15 



Oct. 19 



Nov. 30 



Dec. 14 



Dec. 20 



Dec. 16 



Mar. 14 



Dec. 25 



Nov. 5 



Nov. 21 



Dec. 31 



Dec. 10 



Dec. 3 



Dec. 16 



Nov. 27 



Dec. 12 



Nov. 15 



Dec. 2 



Dec. 20 



Dec. 10 



Nov. 20 



Nov. 27 



Dec. 8 



Nov. 18 



Nov. 13 



Dec. 13 



Nov. 25 



Dec. 9 



Nov. 25 



Dec. 18 



10 



12 



7 



3 



13 



Sept. 22 



Nov. 28 



Nov. 18 



Nov. 15 



days. 



132 



291 



197 



282 



249 



334 



326 



205 



336 



240 



308 



286 



294 



269 



139 



285 



240 



164 



292 



275 



347 



284 



289 



309 



218 



221 



291 



306 



311 



264 



280 



296 



272 



287 



292 



319 



238 



294 



274 



260 



264 



328 



271 



274 



283 



329 



230 



207 



301 



283 



242 



135 



256 



274 



253 



