A CONTRIBUTION TO AUSTRALIAN OCRANOGRAPHY. 689 
Tables A give results obtained between Fremantle and Mel- 
bourne. 
Tables B give results obtained between Melbourne and Bris 
bane. 
Tables C give results obtained north of Brisbane. 
Tables D give results obtained between Melbourne and The 
Bluff, N.Z. 
Tables E give results obtained between The Bluff, via East 
Coast, N.Z., and Sydney. 
Table F give results obtained from samples taken by the writer 
in Bass Straits, off Sorrento. 
Samples A to M (Table F) and Nos. 1 to 165 and 202-4, all 
inclusive, were tested with the small hydrometer, all others with 
the large one. 
An examination of Tables A, will show that the density in St. 
Vincent’s Gulf is always considerably higher than in the Great 
Australian Bight, whilst the latter shows a lower density gener- 
ally in November, 1596, than in the previous August or May. 
In May only do we find traces of the high density shown by Dr. 
Buchan in the “Challenger” reports as existing on the west coast 
of Australia. Tables B show lower densities between Melbourne 
and Brisbane in December, 1896, and March, April, and May, 
1897, than in May and August, 1896. Tables C show through- 
out a remarkable drop in density on passing north of Mackay, 
Queensland, due, no doubt, to the heavy rains discharged by the 
coast rivers into the sea within the Barrier Reef. Tables E 
disclose a remarkable rise in temperature and density at latitude 
46° 16’ 8S. and longitude 165° 46’ E. in May, 1896, and peculiar 
variations in both temperature and density at this locality in 
November, 1896. One is tempted to speculate as to the existence 
of any peculiar currents in this locality. Tables E show very 
clearly the increase in density in passing through Cook Strait from 
the east coast of the South Island of New Zealand, westerly 
towards Sydney. 
Table F gives a series of density determinations made by the 
writer on waters obtained by him in Bass Strait, and are interest- 
ing as showing the variations met with at one spot. The writer 
has made these determinations as often as possible, and the series, 
Nos. 258 and onwards, are specially interesting, as the observa- 
tions were made almost daily. _ 
Table G gives a series of sea temperature observations taken by 
the writer in Bass Strait. Observations of this character are 
useful in determining the positions of the surface isothermal 
lines of the ocean at different periods of the year. The results 
DX 
