AND ON THE DIURNAL INEQUALITY. 
21 
Australia (South side). 
Lat. 
S. 
Long. 
E. 
High water. 
Mean. 
Low water. 
Mean. 
Greatest 
range. 
Least 
range. 
Diurnal inequality. 
Greatest 
interval. 
Least 
interval. 
1 
Greatest 
interval. 
Least 
interval. 
h m 
h ra 
h 
m 
h m 
h m 
ft. 
ft. 
Cape Upstart 
20 
9 50 
11 0 
9 
0 
10 0 
6 30 
2 40 
4 35 
10 
2 
Not observed. *Belcher. 
Port Bowen 
m 
10 3 
10 40 
9 
0 
9 50 
4 30 
2 30 
3 30 
15 
1 
High water, 3 ft.; low water, 1ft. *B. 
Bass’s Straits. 
Kent’s Group 
39i 
9 49 
11 50 
9 40 
10 45 
5 40 
4 0 
4 50 
6 
Low water.’ *Stokes. 
Port Refuge 
39 
9 45 
11 36 
10 50 
11 13 
5 14 
4 28 
4 51 
6 
•>2 
High water.’ low water, 2 ft. *Stokes. 
Western Port 
381 
9 41 
1 30 
1 
0 
1 15 
7 40 
7 0 
7 20 
6 
5 
High water, 2 ft.; low water, 2 2 ft. *S. 
Port Phillip 
38 
9 38 
12 48 
11 
0 
11 54 
7 10 
4 50 
6 0 
O 
2 
Low water ? *Stokes. 
Preservation Island ... 
401 
9 52 
11 12 
10 40 
10 56 
5 30 
4 50 
5 10 
7 
4 
Low water, 2 ft. *Stokes. 
Swan Island 
41 
9 52 
10 20 
9 
40 
10 0 
4 50 
3 12 
4 1 
6 
3 
Port Dalrymple 
41 
9 47 
12 14 
11 
24 
11 49 
7 36 
5 40 
6 38 
9 
6 
High water ? low water, 3 ft. *Stokes. 
Circular Head 
41 
9 41 
12 0 
11 
38 
11 49 
6 0 
5 14 
5 37 
9 
7 
High water ? low water, 2-J- ft. *S. 
Tliree Hummock Island 
401 
9 36 
12 20 
11 
30 
11 55 
6 30 
4 50 
5 40 
6 
5 
High water, 1 ft.; low water, 1 ft. *S. 
Adelaide 
35 
9 14 
6 24 
3 
24 
4 54 
13 0 
9 30 
11 15 
7 
3 
High water, 3 ft. ; low water, 1 ft. 
King George’s Sound... 
35 
7 52 
Swan River 
32 
7 43 
10 48 
7 
0 
8 54 
8 48 
6 30 
4 39 
3 
1 
Single day tides. Flinders. King. 
Latitude Island 
28f 
7 35 
11 0 
9 
12 
10 6 
5 30 
3 0 
4 15 
2 
1 
Di.in.of ft»ics,highandlowwater. "^S. 
East Wallaby 
28f 
7 35 
11 30 
8 
0 
9 45 
6 10 
2 30 
4 20 
2 
1 
Di. in. oft. and h.H.W.and L.W. *S. 
Depuck Island 
201 
7 50 
12 0 
10 
12 
ll 6 
5 30 
4 12 
4 51 
14 
6 
High water, 2ft.; low water, 2 ft. *S. 
Port Essington 
11 
8 48 
3 30 
2 
Oi 
1 
2 50 
10 12 
9 0 
9 36 
8 
2 
High water, 2 ft. ; low water, 8 ft. 
Supposing the “establishment” of a place on this coast to be about 30™ more than 
the mean lunitidal interval (that is, than the corrected establishment'), we can connect 
them with the preceding observations. Thus we shall have 
Long. West. Time of high water. Greenwich time. 
Port Phillip .... 14“ 22™ 12“ 24™ 2“ 46™ 
Adelaide 14 46 5 24 8 10 
Port Essington ... 15 12 3 20 6 32 
Swan River .... 16 17 9 24 1 41 
At Adelaide 1 have a considerable sei’ies of observations which deserve special 
attention. 
38. I have now put together all the principal materials which I have procured for 
determining the course of the tides of the Pacific. But it is apparent from what has 
been said, that the materials are insufficient to give us any complete or consistent 
view of the tidal movements of the waters of that ocean and the neighbouring seas. 
39. I may observe, moreover, that there appears to be little chance that our know- 
ledge of these tides will ever be much increased by observations made in voyages 
principally directed to other objects. Although, in the surveying and exploring 
voyages since Captain King’s, many tide observations on the coasts and at the islands 
of the Pacific have been made, and many of them with care and skill, we have 
scarcely any material fact added to our knowledge ; and the cotidal lines for the 
shores of America, New Zealand and Australia, as I drew them in 1833, remain with 
scarcely any alteration. Cook’s observations at New Zealand, for instance, are for 
this purpose, better than any since made, because they are connected (being made by 
the same navigator and in close succession) and extend along a continuous shore. 
It is only by observations thus connected and having some degree of geographical 
continuity, that we can hope to trace the course of the tides. 
