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furnishes the basis of what, it is believed, will be the solution of 
the problem. They have shown that wheat, transported from 
one part of the country with a known length of growing season, 
to an adjacent part with a slightly shorter growing season, will 
thrive very well. And if this process is continued with places 
having a progressively diminishing growing season, wheat may 
finally be grown in a country that would not have grown it if it 
had been transported the whole distance at the initial move. 
In other words they have successfully proven that the length of 
the growing season has a more profound influence on plants than 
any other temperature factor. r. Gager suggested that this 
factor be reduced to some working basis for the plants in our 
local flora range. With this in mind sixty-three different points 
within the hundred-mile radius were taken and the length of 
the growing season determined for each. This was done by 
adding the number of days between the last killing frost of spring 
and the first killing frost of autumn. Only places where there 
were complete records for ten years or more were selected. The 
results have been instructive and suggestive as there is a differ- 
ence of more than one hundred days in the length of the growing 
season between the Catskill region and southern Jersey. At 
Windham the season is one hundred and twenty-three days: at 
Cape May two hundred and twenty days. Some of the places 
in the high mountains ot New York and Pennsylvania have 
contains the northern plants; while the other has a growing 
season of one hundred and sixty-three days or more (usually 
much more) and contains the more southern plants. 
Taking the pine family it was found that the red pine, the 
white spruce, and the fir had never been discovered outside of 
the first of the regions mentioned above, that is, they have never 
been detected growing in a region with a growing season of one 
hundred and fifty-three days or more. It is proposed to plot 
out the distribution of all the species in the range, giving the 
