218 



ENVIRONMENTAL CONDITIONS. 



Table 6. — Summations of normal daily mean remainder indices of temperature efficiency for 

 plant growth, for the period of the average frostless season. (Plate 38.)— ^Continued. 



Station. 



Length of 

 frostless 

 season. 



Direct summation of normal daily mean 



temperatures for period of average 



frostless season. 



Iowa: 



Charles City 



Davenport 



Des Moines 



Dubuque 



Keokuk 



Sioux City 



Kansas : 



Concordia 



Dodge 



Topeka 



Wichita 



Kentucky: 



Lexington 



Louisville 



Louisiana : 



New Orleans 



Shreveport 



Maine: 



Eastport 



Portland 



Maryland : 



Baltimore 



Washington, D. C 

 Massachusetts: 



Boston 



Nantucket 



Michigan: 



Alpena 



Detroit 



Escanaba 



Grand Haven 



Grand Rapids .... 



Houghton 



Marquette 



Port Huron 



Sault Ste. Marie. . 

 Minnesota: 



Duluth 



Moorhead 



St. Paul 



Mississippi : 



Meridian 



Vicksburg 



Missouri: 



Columbia 



Hannibal 



Kansas City 



St. Louis 



Springfield 



Montana: 



Havre 



Helena 



Kalispell 



Miles City 



days. 

 133 

 174 

 171 

 176 

 197 

 146 



173 

 181 

 189 

 194 



187 

 196 



310 

 252 



167 



157 



213 

 197 



185 

 209 



137 

 164 

 140 

 167 

 164 

 152 

 140 

 155 

 138 



152 

 132 

 159 



230 

 252 



179 

 183 

 196 

 207 



187 



122 

 144 

 140 

 140 



Above 

 0°F. 



9,095 

 11,755 

 11,594 

 11,688 

 13,215 

 10,041 



12,171 

 12,612 

 13,086 

 13,660 



12,880 

 13,791 



21,971 

 18,228 



2,119 

 2,699 



14,281 

 13,385 



11,630 

 12,411 



8,330 



10,738 



8,536 



10,481 



10,745 



8,979 



8,367 



9,777 



7,959 



8,973 



8,499 



10,342 



16,424 

 18,032 



12,487 

 12,701 

 13,362 

 14,395 

 12,907 



7,811 

 8,785 

 8,283 

 9,337 



Above 

 32° F. 



4,839 

 6,187 

 6,122 

 6,056 

 6,911 

 5,396 



6,635 

 6,820 

 7,038 

 7,452 



6,896 

 7,519 



1,251 

 10,164 



3,775 

 4,675 



6,816 

 7,081 



5,710 

 5,723 



3,946 

 5,490 

 4,056 

 5,137 

 5,497 

 4,115 

 3,887 

 4,817 

 3,543 



4,109 

 4,275 

 5,254 



9,064 

 9,968 



6,759 

 6,845 

 6,090 

 7,771 

 6,923 



3,907 



4,177 

 3,803 

 4,857 



Above 

 39° F. 



3,908 

 4,969 

 4,925 

 4,824 

 5,532 

 4,347 



5,424 

 5,553 

 5,715 

 6,094 



5,587 

 6,147 



9,881 

 8,400 



2,606 

 3,576 



5,974 

 5,702 



4,415 

 4,260 



2,987 

 4,342 

 3,076 

 3,968 

 4,349 

 3,051 

 2,907 

 3,732 

 2,577 



3,045 

 3,351 

 4,141 



7,454 

 8,204 



5,506 

 5,564 

 5,718 

 6,322 

 5,614 



3,053 

 3,169 

 2,823 

 3,877 



Above 

 50° F. 



2,578 

 3,229 

 3,215 

 3,064 

 3,562 

 2,887 



3,694 

 3,743 

 3,825 

 4,154 



3,717 



4,187 



6,781 

 5,880 



936 



2,006 



3,844 

 3,732 



2,565 

 2,170 



1,617 

 2,702 

 1,676 

 2,298 

 2,709 

 1,531 

 1,507 

 2,182 

 1,197 



1,525 

 2,031 

 2,551 



5,154 

 5,684 



3,716 

 3,734 

 3,758 

 4,252 

 3,744 



1,833 

 1,729 

 1,423 



2,477 



