472 
Proceedings of the Boy at Society 
river mouth at regular intervals for several miles. The results of 
this method are made uncertain by the fact — which we in part 
verified after it was reported to us — that much of the Spey water 
reaches the sea by filtering through the enormous shingle banks, 
and so trickling down almost imperceptibly, but still exerting a 
distinct freshening influence along the shore line. 
VIII. The first trip of about 3 miles straight out from the Spey 
was made on 30th July, from about 1 hour before high water to 
three quarters of an hour after it. 
Position, 
: : { 
Outside 
Bar. 
1 mile 
out. 
2 miles 
out. 
3 miles 
out. 
f mile 
out. 
f mile 
out. 
Bar. 
Depth, , 
2 fm. 
6 fm. 
10 fm. 
Temperature, - 
f Surface, 
^ Bottom, 
59-0 
56-5 
58 : 0 
58-0 
53-7 
58-0 
52-8 
5*8-2 
6*4*0 
65-0 
Density, . . - 
f Surface, 
1-01109 
1 '02546 
1-02497 
1-02557 
1-02534 
1-01339 
1-00065 
( Bottom, 
1-02527 
1-02587 
1-02598 
IXa. On 10th August, when the river was very low, a trip was 
made from Port Gordon, and samples were collected on the out- 
ward voyage at regular intervals along the circumference of a circle 
of 3 miles radius, with the mouth of the river as a centre. It was 
impossible to get the compass placed high enough to enable us to 
take bearings accurately, so the positions were only approximately 
determined. The weather was on the whole bright, with occasional 
showers. There was a stiff breeze from the south-south- west, which 
became very squally towards afternoon. The five sets of observations 
made from 9 h .30 to 12 h .30, when it was high water, are as follows : — - 
Position and Depth, -< 
Off Port 
Gordon. 
II. 8 fm. 
Opposite 
the Spey. 
IV. 10 fm. 
Near Boar’s 
Head Rock. 
Tempera- 1 
ture, 1 
'Surface, 
Half depth, 
I. 3 fm. 
566 
56-5 
III. 10 fm. 
56-9 
56-8 
V. 5 fm. 
56-2 
56-3 
57-6 
56-1 
^Bottom, 
5*6*4 
55-3 
53-2 
53*3 
5 60 
'Surface, 
1-02562 
1-02554 
1-02539 
1-02536 
1-02576 
Density -i 
Half depth, 
1-02564 
1-02549 
1-02531 
1-02564 
( 
^Bottom, 
1-02564 
1-02569 
1-02584 
1-02577 
1-02579 
On returning nearer land the surface density at Station IV. was 
1 ’02572, and further in-shore it was 1 ’02376. 
1X5. When opposite Tugnet (on the east side of the river) the 
density was observed by the small hydrometer at intervals of a 
minute while sailing west about a quarter of a mile off-shore until 
opposite Kingston. Tide 2 hours ebb. 
Off Tugnet, 14M8. Off the Spey. Off Kingston, 14h.25. 
1-028 1-018 1-014 1-015 1-010 1-010 1C20 1-026. 
