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Updated: May 14, 2025
The shoot had now grown 3.5 inches in length, and carried at its extremity a young internode 1 inch in length, which showed slight changes in its curvature. The next or ninth revolution was effected in 2 hrs. 30 m. From this time forward, the revolutions were easily observed.
The warning-bell, at 12.45 P.M., after 1 hr. 45 min. rest, would prepare the men to fall in, and return to work at 1 P.M.; and the afternoon-spell would last till 5.30. Thus the working-day contains 9 hrs. 30 min. Dinner would be served at any time after 6 P.M., and the allowance of liquor be that of the breakfast.
A large worm left on the surface did not succeed in penetrating it for some hours, and did not bury itself completely until 25 hrs. 40 min. had elapsed. This was effected by the sand being swallowed, as was evident by the large quantity ejected from the vent, long before the whole body had disappeared.
In the beginning of September they were caught in a severe tempest, which separated the ships for a time, and held the Admiral weather-bound for eight days. There was an eclipse of the moon during this period, and he took advantage of it to make an observation for longitude, by which he found himself to be 5 hrs. 23 min., or 80 deg. 40', west of Cadiz.
A long, nearly upright shoot made four revolutions, moving against the sun, very regularly at an average rate of 3 hrs. 26 m. The shoots, however, sometimes stood still. It is considered a greenhouse plant; but when kept there, the petioles took several days to clasp a stick: in the hothouse a stick was clasped in 7 hrs.
Three shoots, cut off a plant, and placed in water made circles in 3 hrs. 10 m., 5 hrs. 20 m., and 7 hrs. 15 m. H. M. May 13, 1st circle was made in 3 5 13, 2nd 3 20 16, 3rd 2 5 24, 4th 3 21 25, 5th 2 37 25, 6th 2 35 H. M. May, 1st circle was made in 2 0 2nd 1 55 3rd 1 55 H. M. April 18, 1st circle was made in 8 0 19, 2nd 9 15 30, 3rd 9 40 Dipladenia crassinoda moves against the sun.
In one case the tips were slightly swollen in 38 hrs. after coming into contact with a brick; in another case they were considerably swollen in 48 hrs., and in an additional 24 hrs. were firmly attached to a smooth board; and lastly, the tips of a younger tendril not only swelled but became attached to a stuccoed wall in 42 hrs.
For at this period they have generally quite lost their sensitiveness; and when hooked on to twigs, some were not at all affected, and others required from 18 hrs. to 24 hrs. before clasping such twigs; nevertheless, they were able to utilise the last vestige of irritability owing to their extremities being hooked.
A sketch is here given of two young leaves which had naturally caught hold of two thin branches. A forked twig placed so as to press lightly on the under side of a young footstalk caused it, in 12 hrs., to bend greatly, and ultimately to such an extent that the leaf passed to the opposite side of the stem; the forked stick having been removed, the leaf slowly recovered its former position.
When, however, Dutrochet cut off two whole shoots of the Hop, and placed them in water, the movement was greatly retarded; for one revolved in 20 hrs. and the other in 23 hrs., whereas they ought to have revolved in between 2 hrs. and 2 hrs. 30 m. Shoots of the Kidney-bean, cut off and placed in water, were similarly retarded, but in a less degree.
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