473 
of Edinburgh, Session 1885 - 86 . 
Off the mouth of Spey in 2 fms. the density at the surface was 
1-01051, at 3 feet deep 1*02448, and at the bottom 1*02509. At 
15 h .15 the density at Station II. was 1*02551 at the surface and 
1*02557 at the bottom in 6 fathoms. 
Xa. Another trip from Port Gordon was made on 18th August, 
between 10 h .50 and 16 h .40. The river, which had come down in 
heavy spate on the 13 th, was still unusually full. The weather 
was bright and warm, the wind very light, and a considerable 
swell was coming in from the north-east. The wind was dead on 
land, and too light for the boat to sail up to, consequently we had 
to keep near the shore, about half a mile out, while going west- 
ward, until off the Spey. The water was swarming with medusae 
of all siz;es and colours. The following observations were made in 
the course of the day, the densities being determined on shore by 
the delicate hydrometer, and reduced by calculation to 15°*56 C.: — 
Position, 
Off 
Buckie. 
Off 
Port 
Gordon. 
Halfway 
to Spey. 
Off Spey Bar. 
Between Spey and 
Port Gordon. 
Hour and tide, . . | 
10 h .50. 
ll h .45. 
12 h 42. 
| mile out. 
13 h .50. 
f mile out. 
14*15. 
15 h .15. 
15*55. 
5 hrs. ebb. 
l.w. 
i hr. fld. 
If hr. fld. 
2 hrs. fld. 
3 hrs. fld. 
3§ hrs. fld. 
Depth, . 
\ 
8 fm. 
6£ fm. 
5 fm. 
4f fm. 
4 fm. 
7 fm. 
5 fm. 
[Surface, . 
54-9 
55-1 
56-2 
57-1 
56-1 
57-7 
57-1 
Temperature, < 
Half-depth, 
55-2 
55-2 
55-9 
55-6 
55-6 
55-7 
l 
[Bottom . 
53-8 
55-2 
55-3 
55-2 
55-0 
55-3 
< 
'Surface, . 
l l 02285 
1-02383 
1-02445 
1-01227 
1-02435 
1-02267 
1 02328 
Density, •< 
Half-depth, 
1-02548 
1-02554 
1-02403 
1-02535 
1-02525 
1-02555 
1-02538 
^Bottom . 
1-02318 
1-02562 
1-02544 
1-02536 
1-02545 
1-02554 
1-02540 
Quarter of a mile off Port Gordon the surface density was 1*02164, 
and at the harbour mouth 1*02140. 
X6, When we were in the neighbourhood of the mouth of the 
river, a great many observations were made with the small hydro- 
meter. The high density of the sample of water taken home from 
near the river mouth (1*02435 at the surface) must be explained by 
the boat’s drifting a little to the east of the fresh current before the 
sample was bottled, for while coming straight in steering for the bar 
from the previous position, the readings of the small hy drome uer 
were — 
1-013, 1-015, 1-012, 1-0125, 1-0125, 1-010, 1-0085, 1-0085. 
Returning from that position, and steering X. by W., in the direc- 
tion of the axis of the river, we found the density to vary as 
follows : — 
1-026, 1-022, 1-020, 1-018, 1-0185, 1-019, 1-0195, 
1-020, 1-021, 1-023, 1-0235, 1*0245, 1-0245, 1-025. 
