n 



BULLETIN 655, U. S. DEPARTMENT OF AGRICULTURE. 



yearly averages and general averages were computed from the data 

 given in Tallies LI and III, and the results are presented in Table V. 



Table V. — Comparison of yield, specific gravity, acid value, iodin value, and time of 

 drying of oils from jinx grown at seven different stations in 1914 and 1915. 



[The stations where>the seed samples were grown are designated by numbers as follows: No. l=Moccasin, 

 Mont.: No. 2= Dickinson, X. Dak.; Xo. 3 = Mandan, X. Dak.; Xo. 4 = Newell, S. Dak.; Xo. 5=IIighmore, 

 S. Dak.; No. 6— Archer, Wyo.; Xo. 7=Burns, Oreg.] 





Yield of oil (per 

 cent). 



Specific gravity. 



Acid value. 



Iodin value. 



Time of drying 

 (days). 



Station. 



Yearly : « 





Yearly 



© 





Yearly 







Yearly 







Yearly 



3 



> 







average a ■ 





average. 



CJ . 





average. 



05 . 



— <B 





average. 



S3 . 

 — 8> 





average. 



08 







- it 

















C3 tx 







S3 M 











J4 





5 a 



M 





















3 a 









o 



a 







ia 





a 



■* 



lO 





a 



■* 



»o 





a 



•^* 





c 



- 











































a 



OS 



o 



6 



OS 



o> 



o 



« 



o> 



o 



o 



_ 

 6 



OS 



Oi 



o 



« 



7 



17.0 



12.2 



O 



« 



Xo. 1 



34. 35 33. 87 



34.11 



0.9274 0.92900.9282 



6 0. 797 



0.707 



0.752 



157.8 



154.7 



156. 2 



14.6 



5 



Xo. 2 



34. 52 34. 82 34. 67 



3 



.9307 .9292 .9299 11.025 



.820 



.922 



2 167. 2 162. 7 



164.9 



2 7 



20. 2 13. 6 



2 



Xo. 3 



33. 74 34. 93 34. 33 



5 



.9279 .929S .92S8 4 1.057 



.785 



.921 3161.9161.6 



161.7 



310 



18. 2 14. 1 



4 



Xo. 4 



32. 97 35. 81 34. 39 



4 



.9274 .9293 .9283 51.070 



.737 



.903 4 157.7161.8 



159.7 



5 23. 6 



21. 22. 3 



7 



No. 5 



34.32 35.6735.00 



2 



.9272 .92.86 .9279 71.285 



.695 



. 990 1 157. 4 162. 1 159. 7 



6'22. 5 



15.0 18.75 



6 



No. 6 



33. 35 38. 79 36. 07 



1 



.9276 .9312 .9294 2 .775 



.947 



.861 516(3.6171.8169.2 



111.7 



12. 2 11. 95 



1 



No. 7 



34. 30 33. 26 33. 78 



7 



.9279 .9299 .92S9 3' .975 



, 1 



.507 



.741 7161.8158.4 160.1 



.III 



4 18. 5 



9. 13. 75 



1 



3 



The results given in Table V show that the yield of oil from the 

 groups of samples at the stations mentioned are for the most 

 part fairly constant during the two seasons. The yield during 1914 

 was uniformly lower than in 1915 with two exceptions. Burns, 

 Oreg., and Moccasin, Mont., averaged slightly higher in 1914 than 

 in 1915. 



The amount of precipitation at each station during the growing 

 months in 1914 and 1915 is perhaps the most influential factor in 

 affecting the yield of oil, since the proper growth and maturity of 

 the flax plants are dependent largely upon the amount of moisture 

 available to the plants. B}^ consulting Table I it will be observed 

 that the precipitation during the growing months in 1914 was less at 

 all stations except one (Dickinson, N. Dak.) than in 1915. It is 

 singular to note that when the greatest differences occurred in the 

 yield of oil at these stations there was also the greatest difference in 

 precipitation. Thus, samples from Newell, S. Dak., and Archer 

 Wyo., gave much higher yields of oil in 1915 than in 1914. The pre- 

 cipitation at these stations during the growing months was likewise 

 much greater in 1915 than in 1914. 



The yield of oil from the samples from Moccasin, Mont., in 1914 

 (34.35 per cent) is but slightly higher than in 1915 (33.87 per cent). 

 The precipitation during the growing months of these two seasons 

 also shows but slight variation. Samples from Burns, Oreg., show a 

 higher yield of oil in 1914 (34.30 per cent) than in 1915 (33.26 per 

 cent). The precipitation was likewise greater in 1914 (4.27 inches) 

 than in 1915 (2.90 inches). 



