362 Journal of the Asiatic Society of Bengal. [Aug.-Sept., 1913. 
of the results obtained from four different hydrometers ; 
already pointed out, these are only capable of recording to 
the nearest degree, so that it was 
accurate result. At the same time t 
obtained have been converted into salinities by calculating the 
chlorine equivalent from Ditmar’s tables in the ‘‘ Challenger ”’ 
Reports (Physics and Chemistry, Vol 1, Table VII, p. 70, 
and Table IX, p. 80) and by multiplying this figure by the 
factor 17974, as given by Ernst Ruppin, 1911. 
Most of the readings were taken at stations widely distant 
from one another, but a few were taken at different dates in 
Byikhwaaw Bay. These have been plotted out, according to 
Rae 
L.W. 
Byikhwaaw Bay, 
Fig. 4, 
—In this and the succeedi . ‘ : 
shows the ri \cceeding diagrams, the interrupted line 
salinity, © rise and fall of the tide, and the continuous line that of the 
a of os tide at which they were obtained, the necessary 
tide: chi § obtained from the observations recorded by the 
party Stationed in the bay itself. The result is shown in 
=~ accompanying diagram. 
though the results obtained : 
: were net very satisfactor 
they tend to show that In this region, at any dite thas ae 2 
tinct fall and subsequent tise in the salinity of the water 
rise of the tide this water is carri i 
ried past Byikhwaaw Bay up the 
coast towards the phe eaeag Islands, a second fall ast rise 
