THE CURRENT METER 337, 
Without entering upon any complex theory this phenomenon 
can be explained by the fact that with a high southerly declination 
the tide that would be normally caused by the 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 interrupted 
by sledging and before the sea ice had broken up, the air tem- 
perature was warm enough to permit observations on the cur- 
rents being taken with an Ekmann current meter. Series of meas- 
urements were obtained with this instrument which should prove 
of great interest. 
Exceptionally severe weather characterised the second win- 
ter, 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 instrument 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. 
VOL. H—22 
