14 BULLETIN 655, U. S. DEPARTMENT OE AGRICULTURE. 
and 1915. Close relationship also existed in the Moccasin, Mont., 
and Burns, Oreg\, samples. The Archer, Wyo., samples possessed 
high iodin values, occupying almost the same relative positions 
during both 1914 and 1915, as did also Dickinson and Mandan, 
N. Dak., while Highmore and Newell, S. Dak., and Moccasin, Mont., 
averaged constantly low. 
In the time required for drying, a close relationship exists among 
several of the stations from year to year. The Archer, Wyo., sam- 
ples show a comparatively uniform and short time for drying during 
both seasons. The Newell, S. Dak., oils required a uniformly longer 
time for drying than those from any of the other States. In both 
of the stations there is a certain relationship between the drying 
property and the physical and chemical properties. Thus, the 
Archer. Wyo., samples dried the most rapidly of all. These oils 
also poss?3sed the highest average iodin values, high specific gravi- 
ties, and moderately high acid values. The Newell, S. Dak., sam- 
ple^, on the other hand, were the slowest in drying and likewise 
possessed comparatively low iodin value, specific gravity, and acidity. 
The Dickinson, N. Dak., samples, ranking next to those of Archer in 
rapidity of drying, combined high iodin and acid values with high 
specific gravity. The Highmore, S. Dak., samples, ranking next to 
those from Newell, S. Dak., in slow-drying properties, combined 
very low iodin values and specific gravities with high acidity. The 
Mandan. N. Dak., samples, ranking fourth in drying property, 
combined medium-low iodin and acid values with low specific gravity, 
while the Moccasin, Mont., samples, ranking fifth in drying property, 
also combined very low iodin and acid values with low specific 
gravity. The same relationship appears, therefore, to exist between 
the drying property and the physical and chemical properties of the 
oils, when compared from the station standpoint, as exists when 
comparing the varieties at the several stations. 
RELATION OF THE OILS TO THE SOURCE OF SEED. 
Discussing the relation of geographical source to yield of oil it may 
be stated that while some variation occurs from year to year at any 
one locality, due largely to climatic conditions, certain stations may 
be said to produce flax showing higher average yields of oil than 
others. The Archer, Wyo., Highmore, S. Dak., and Dickinson, 
N. Dak., samples produced relatively high average oil yields, followed 
by tho - from Newell, S. Dak., and Mandan, N. Dak., while the 
Moccasin, Mont., and Burns, Oreg., samples produced relatively low 
yields during the two years under observation. 
It is very probable from the results shown that the yield of oil 
from the various flax varieties is dependent to a certain extent upon 
the geographical location with the varying conditions of soil and 
climate. 
