412 
Proceedings of the Royal Society 
The bottom temperature has not sensibly altered at Inversnaid since 
5th September. In .the Tarbet basin the greatest difference of 
temperature at the same depth is 2 0, 1 at 20 fathoms. 
Table IV . — Observations in Loch Lomond , 15 th October 1885. 
Name of Basin, 
Luss. 
Tarbet. 
Ardlui. 
Locality, 
Ross 
Rowar- 
Stuck- 
Inver- 
Doune 
Mill. 
dennan. 
gowan. 
snaid. 
Farm. 
Miles from Balloch Pier, 
7\ 
9 
11 
14 
17 
Depth at Station, . 
33 
37 
91 
100 
34 
Hour of the day, 
11 A.M. 
Noon ] 
1 P.M. 
4.30 p.m. 
1.30 p.m. 
3.30 p.m. 
) 2.30 
\ P.M. 
No. of Station, 
• 
11 
12 
13 
14 
15 
Depth. 
Fathoms. 
No. of 
Thermo- 
meter. 
Temperature (Fahr.). 
0 
49-4 
49*1 
49 T 
48*7 
47*8 
5 
9 
49*2 
49*0 
49*05 
48*4 
46*7 
10 
80 
49*05 
49*05 
49*0 
48*2 
46*3 
15 
79 
49*0 
49*0 
49*0 
48*1 
46*3 
20 
47 
49*1 
48*95 
48*8 
47*8 
46*2 
30 
21 
48*9 
42*44 
• 42*9 
45*3 
45*9 
35 
47 
44*2 
40 
79 
• •• 
42*4 
45 
79 
42*8 
50 
9 
42*2 
65 
9 
42*2 
70 
80 
42 T 
80 
47 
42*0 
85 
80 
42*0 
90 
21 
42:0 
... 
Btm. 100 
21 
... 
42*0 
0 to 30 mean, . 
49*0 
48*37 
48*37 
47*9 
46*47 
0 to 20 „ 
• 
49 T 2 
49*04 
49*00 
48*24 
46*58 
1 5tli October 1885. — A very fine day, with moderate north- 
easterly wind. For three days a strong northerly wind had been 
blowing with dry weather, and for a fortnight before there had been 
a succession of cyclonic gales, with much rain, so that at the begin- 
ning of the week the level of the lake was higher than I have ever 
seen it, and quite 3 feet above its usual summer level. The 
operations were all successfully carried out, the launch being kept 
stern to wind. 
Amongst the salient features of the distribution of temperature at 
