488 
scorrs last expedition 
Without entering upon any complex theory this pheno- 
menon can be explained by the fact that with a high 
southerly declination the tide that would be normally 
caused by tlie inferior wave is so small as to be 
inappreciable to ordinary observation. With the moon 
at maximum northerly declination it would, of course, 
be the superior wave that would not appear. With the 
moon on the equator diurnal inequality disappears, and 
the two tides are experienced. 
During the short summer before the work was inter- 
rupted by sledging and before the sea ice had broken 
up, the air temperature was warm enough to permit 
observations on the currents being taken with an Ekmann 
current meter. Series of measurements were obtained 
with this instrument which should prove of great interest. 
Exceptionally severe weather characterised tlie second 
winter, and the fact that the sea ice was being constantly 
blown out made marine work impossible for extended 
periods. 
Since a very complete tide record had been obtained 
during the first year, it was decided to convert the instru- 
ment used for this purpose, of which only one was 
available, into a seiche meter. One record was obtained 
and then the instrument was lost, owing to sea ice, which, 
past experience had led us to believe was safe, blowing 
out and carrying the apparatus to sea. Otherwise the 
programme was similar to the previous year. 
