of Edinburgh , Session 188 5 - 8 6 . 411 
Table III. — Observations in Loch Lomond , 22 nd September 1885. 
Name of Basin, 
Luss. 
Tarbet. 
Locality, .... 
Boss Mill. 
Rowan- 
dennan. 
Inversnaid. 
Miles from Balloch Pier, . 
74 
9 
14 
Depth at Station, 
33 
37 
100 
Hour of the day, 
1.30 p.m. 
2.30 p.m. 
4 P.M. 
No. of Station, . 
11 
12 
13 
Depth. 
Fathoms. 
No. of Ther- 
mometer. 
Temperature (Fahr. ). 
0 
53*6 
53-6 
53-7 
5 
*9 
53-5 
53-35 
53-7 
10 
80 
53-45 
53-4 
53-65 
15 
79 
53-4 
52-3 
52-25 
20 
47 
48-8 
45-1 
47-2 
30 
21 
47-55 
42-9 
43-5 
35 
47 
42-6 
45 
79 
42-25 
65 
9 
42-0 
85 
80 
41-8 
Btm. 100 
21 
41-8 
0 to 30 mean, 
. 
51-94 
50-49 
51-08 
Steepest gradient, 
$ Degs. pr. fath. , 
| Depth, 
0-9 
18 
1*44 
17 
1-01 
18 
22 nd September 1885. — The weather was very stormy, and hr.d 
been so for a fortnight, with much rain, so that the level of the 
lake was very high. Wind fresh from the south-west. The 
weather was so squally that it was difficult to keep station. At 
the Ross Mill station I kept the launch head to wind with a couple 
of oars out, but it was not very successful. At the other two 
stations I kept her stern to wind, with a steer-oar out over the bow 
and occasionally driving the engine astern. At Inversnaid the wind 
was so strong that I was able to keep the engine going continually 
dead slow astern, and kept station well. 
The character of the distribution is pronouncedly autumnal, 
cooling at the surface is going on rapidly while heat is being pro- 
pagated into the lower layers. The surface layer of approximately 
constant temperature is now about 15 fathoms thick at all the 
stations, and the steepest gradients are found between 15 and 
20 fathoms, the maximum being 1°*44 per fathom at Rowardennan. 
