conspicuously curved
away from the attached squares and from the perpendicular; 13 out of the 39
forming hooks with their points directed towards the zenith, and 8 forming
loops. Moreover, 7 other radicles out of the 68, were slightly and two
doubtfully deflected from the cards. There remain 20 which were not
affected; but 10 of these ought not to be counted; for one was diseased,
two had their tips quite surrounded by shellac, and the squares on 7 had
slipped so as to stand parallel to the apex, instead of obliquely
[page 178]
on it. There were therefore only 10 out of the 68 which certainly were not
acted on. Some of the radicles which were experimented on were young and
short, most of them of moderate length, and two or three exceeded three
inches in length. The curvature in the above cases occurred within 24 h.,
but it was often conspicuous within a much shorter period. For instance,
the terminal growing part of one radicle was bent upwards into a rectangle
in 8 h. 15 m., and of another in 9 h. On one occasion a hook was formed in
9 h. Six of the radicles in a jar containing nine seeds, which stood on a
sand-bath, raised to a temperature varying from 76o to 82o F.
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