Annexe © 
Résultats principaux des expériments avec flotteurs de fond 
Principal results of the experiments with Bottom-Trailers 
I must express my great regret that reasons of health have prevented me 
from keeping the International Council better acquainted with the progress of the 
experiments with my Bottom-Trailers, and that I have not yet been able to make 
a complete analysis of the results, which have proved interesting from many points 
of view. Owing to Dr. Atten’s kind care the record itself has not suffered from 
my inattention; and the accompanying monthly summary of returns has been 
made under his direction from the original cards. 
With regard to direction of flow, the suggestion made in my note of July 
1906!) (on Experiment A), as to a closed eddy, has not been verified. Experiment C 
I designed especially to test this, and the recovery of the bottles was to the N. 
and E. of the points where they were put in, a large number being cast up on 
the shores of Holland and the Zuider Zee islands. It is more probable therefore 
that the northward courses taken by the bottles in Series A, though principally 
due (magnetic) north, fanned out also to the NNE. and NE. Experiment B shows 
(in summer) a strong flow to the NE. and E. from the Texel along the continen- 
tal coast?). 
Dr. Garsrane arranged that a catch of plaice should be marked and put out 
near the bottles of Series A on the same day. He has allowed me to inspect his 
chart of their recovery, and it is interesting to note that there were very few 
taken at the time when the bottles were being recovered in greatest numbers, and 
that his chart of the plaice and mine of the bottles are complementary to each 
other, the movements being practically in opposite directions. The main drift in 
all the series, as generally summarized above, would seem to be in the opposite 
direction to the migration of plaice at the same time of year, as at present de- 
scribed. So far, therefore, the experiments confirm the view of those naturalists 
who suppose that bottom feeders, like trout, tend to move against the current. 
From the positions in which they were found it seemed probable that after 
1) Rapports et Procés-Verbaux Vol. IV. *) See Addendum on p. XL. 
vr 
