184 



ENVIRONMENTAL CONDITIONS. 



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

 United States. (Plate 34.)— Continued. 



Station. 



North Dakota — Continued: 



University (32) 



Wahpeton (H) 



Williston (31) 



Willow City (31) 



Ohio: 



Akron (69) 



Bangorville (72) 



Bellefontaine (70) 



Bowling Green (69) 



Bucyrus (69) 



Cambridge (72) 



Camp Dennison (70) . . . 



Canal Dover (72) 



Canton (69) 



Cincinnati (70) 



Circleville (71) 



Clarksville (70) 



Cleveland (69) 



Coalton (71) 



Columbus (71) 



Dayton (70) 



Defiance (69) 



Delaware (71) 



Demos (72) 



Findlay (69) 



Garrettsville (69) 



Granville (72) 



Gratiot (72) 



Green (70) 



Greenfield (71) 



Green Hill (69) 



Greenville (70) 



Hedges (69) 



Hillhouse (69) 



Hiram (H) 



Hudson (69) 



Ironton (71) 



Jacksonburg (70) 



Kenton (71) 



Killbuck (72) 



Lancaster (71) 



Marietta (72) 



Marion (71) 



McConnellsville (72) . . 



Medina (69) 



Milfordton (72) 



Milligan (72) 



Millport (72) 



Montpelier (69) 



Napoleon (69) 



New Alexandria (72) . . 



New Waterford (69) . . 



North Lewisburg (71) . 



North Royalton (69) . . 



Norwalk (69) 



Altitude. 



feet. 



830 



962 



1,872 



1,471 



1,081 



1,380 



1,276 

 670 



1,000 

 803 

 570 

 884 



1,065 

 628 

 694 



1,010 

 762 

 718 

 918 

 790 

 712 

 927 



1,325 

 776 



1,005 

 960 



1,000 

 500 



1,135 



1,060 



725 



997 



1,260 



1,153 



575 



975 



1,015 



1,087 



898 



627 



980 



710 



944 



1,200 



875 



1,145 



880 



680 



1,050 



1,053 



1,095 



1,000 



719 



No. of 

 years of 

 record. 



17 



30 

 17 



18 

 22 

 15 

 17 

 15 

 16 

 16 

 15 

 18 

 37 

 14 

 16 

 38 

 14 

 31 

 15 

 15 

 13 

 18 

 18 

 22 

 20 

 18 

 15 

 12 

 17 

 16 

 15 

 17 



15 

 17 

 18 

 16 

 16 

 14 

 25 

 17 

 24 

 15 

 16 

 15 

 16 

 17 

 21 

 24 

 14 

 21 

 17 

 16 



Average date of- 



Last frost 

 in spring. 



May 20 



May 8 



May 18 



May 30 



Apr. 27 



May 6 



Apr. 28 



May 10 



May 9 



May 5 



Apr. 25 



May 8 



Apr. 27 



Apr. 14 



Apr. 28 



Apr. 25 



Apr. 16 



May 3 



Apr. 16 



Apr. 27 

 May 

 May 

 May 

 May 



May 18 



Apr. 30 



May 5 



Apr. 21 



Apr. 19 



May 16 



Apr. 30 



May 13 



May 18 



Apr. 28 



May 8 



Apr. 21 



May 2 



May 9 



May 2 



Apr. 24 



Apr. 18 



May 7 



Apr. 29 



May 9 



May 6 

 May 



May 

 May 

 May 

 May 

 May 

 May 

 May 



First frost 

 in autumn. 



Sept. 14 



Sept. 15 



Sept. 14 



Sept. 11 



Oct. 

 Oct. 

 Oct. 

 Oct. 

 Oct. 



Sept. 28 

 Oct. 11 



Oct. 

 Oct. 

 Oct. 

 Oct. 

 Oct. 



2 



5 



25 



5 



7 



Length of 

 average 

 frostless 

 season. 



Oct. 31 

 Oct. 4 



Oct. 

 Oct. 



17 

 10 



Sept. 29 



Oct. 3 



Oct. 10 



Oct. 4 



Sept. 29 



Oct. 5 



Oct. 5 



Oct. 14 



Oct. 12 



Sept. 28 



Oct. 10 



Sept. 30 



Oct. 3 



May 10 



days. 



117 



130 



119 



104 



165 



150 



162 



145 



147 



146 



169 



147 



161 



194 



160 



165 



198 



154 



184 



166 



145 



153 



160 



154 



134 



158 



153 



176 



176 



131 



161 



140 



138 



169 



147 



173 



164 



149 



152 



162 



185 



147 



162 



150 



147 



142 



147 



151 



154 



156 



145 



157 



162 



148 



