638 MR EK. M. WEDDERBURN 
would not have been so high a rise in surface temperature, and the discontinuity would 
have become more abrupt. Otherwise the curves are very similar, and, as will be 
explained later, the observations during this period were somewhat monotonous, 
Fig. 10 * is drawn from observations at Station V., on 24th and 25th August, and 
shows the effect of the very strong west winds which commenced on the afternoon of 
the 24th. A sharp discontinuity is produced—there being at 7 p.m. on the 25th 
Midn. — 6 am. 6 a.li.— noon woo — 6 p.t2. 6p.11.- 7idt1, 
Ses eee Cees ees ees Yerees 
pa ED 
= Z ~! 
= =a 
a= 
Bees 
— = 
=a a eee 
a i: ——F 
a ' : + 
Se ee eee See ee ee eee 
SSeS SS SS SE 
== 
= 
r 
0 2 @ 0 ¢€ 0 F &@ i #8 ¢ Jo ee 
Fig. 8.—Temperature-depth diagrams, August 7th-8th. 
10 12 14° 16° 
a fallin temperature of 7° C. in two metres. The last curve on this diagram shows, 
for comparison, the observations at Station I. at 11 p.m. on the 25th, there being an ~ 
almost complete absence of discontinuity. 
Perhaps a clearer idea of the changes which occur will be gained by an examination 
of figs. 11-15,* which represent for each station the fluctuation of level of various 
isotherms throughout the month. It will be seen at once that in the earlier part of the 
month there was a well-marked oscillation of the isotherms, and a comparison of the 
* See explanation of diagrams, p. 652. 
