ages to grow varied from 91.6 to 95.8. with an average of 93. I am 
unable to explain these discrepancies, and consequently can not attach 
any especial importance to these experiments with kerosene emulsion. 
Turpentine. — A like discrepancy appears in the turpentine experi- 
ments, four plantings for which were made June 15, and six plantings 
June 28. The first, of 100 kernels each, averaged 56^ percent to grow, 
and the second, of 500 kernels each, averaged 88 percent. In the plant- 
ings of 100 kernels made June 15 immediately after dipping in turpen- 
tine, 28 percent grew ; while of another hundred soaked in turpentine 
for 5 minutes, 76 percent grew. Of a third lot, soaked for 10 minutes, 
95 percent grew ; and of the last lot, soaked for 30 minutes, but 27 
percent grew. These variations are so unaccountable and confusing 
as to vitiate this experiment. 
On the other hand, the results of the six plantings of June 28 
varied only from 85 to 90 percent, and these results may be fairly 
accepted. Of 500 kernels dipped in turpentine and planted at once, 
90 percent grew ; of those soaked for 5 minutes before planting, 88 
percent grew ; and of those soaked for 20 minutes, 90 percent grew. 
Of another lot of 500 kernels, soaked first in water for 10 minutes and 
then merely dipped in turpentine, 90 percent grew ; of a second lot 
treated in the same manner except that they were soaked for 5 minutes 
in turpentine, 85 percent grew ; and the same ratio was obtained from 
a third lot similarly treated except that the kernels were soaked for 
20 minutes in water. This treatment with turpentine may be said, 
on the whole, to have been apparently without injurious effect, since 
the check plantings of this date gave a germination average of 89 per- 
cent, while the later plantings with turpentine averaged 88 percent 
to grow. 
Tar-zvater. — Two thousand kernels were planted June 28, after 
treatment with coal-tar water obtained from the bottom of a gas tank, 
or from the top of a tank of coal-tar, at the gas works. One thousand 
of these kernels, merely dipped in the tar-water, gave a germination 
ratio of 94 percent, and of another thousand soaked in it for 5 minutes. 
88 percent grew. 
The principal data of the foregoing discussion are summarized in 
the following table. 
Plot Experiments with Repellents, 1905 
No Treatment of Seed. Check Plots 
Date 
Treatment 
No. of kernels 
Percent to grow 
June 15 
" 28 
None 
200 
1500 
200 
ISO 
88 
89 
" 29 
". 
83 
July 21 
95 
Gener 
al average of checks. ... . . . 
89 
