68 
PROF. T. CARNELLEY, MR, J. S. HALDANE, AND DR. A. M. ANDERSON 
Town. 
West suburbs. 
April 2nd and 3rd, 1886. 
No. of 
No. of 
Determi- 
Lowest 
Highest. 
Mean. 
Determi- 
Lowest. 
Highest, 
Mean. 
nations. 
nations. 
Day, 
Carbonic acid . . . 
13 
2'6 
41 
3-25 
13 
1-7 
2-8 
2-3 
6 a.m. to 7 P.M. 
Organic matter. . . 
12 
2-8 
9-6 
62 
13 
1-7 
8-1 
53 
Night, 
7 P.M. to 5 A.M. 
" Carbonic acid . . . 
Organic matter. . . 
7 
6 
3-0 
25 
4-1 
6-8 
345 
4-6 
10 
10 { 
1-7 
Too small 
to estimate. 
2'4 
| 4-5 
1*75 
1*86 
As before, the day is taken as extending from 5 a.m. to 7 p.m. 
It will be seen that the quantity of carbonic acid in the air during the day on which 
the experiments were made was extremely low, even falling to 1'7 volumes on the 
west of the town during the night. The frequent lowness of the carbonic acid in 
Dundee during last winter is very remarkable, and difficult to account for. It is true 
that the results were obtained during winter, and many of them in the middle of the 
Temperature. 
Carbonic acid. 
Organic matter. 
April 2nd and 
3rd, 1886. 
Town. 
West 
suburbs. 
Town. 
West 
suburbs. 
Town. 
• West 
suburbs. 
Remarks. 
0 Fahr. 
° Fahr. 
r 
Somewhat overclouded, otherwise bright sun- 
i 
shine. Breezy, S.S.E. Chimneys smoking 
7.15 A.M. 
* * 
* * 
53 
8-1 i 
i 
strongly. Smell of smoke. Smoke also 
blown across to west of town from bridge 
works. 
8.15 
. • 
• • 
2-7 
1-9 
81 
41 
Sunny, S.S.E. 
9.15 
50 
48 
26 
2-4 
4-5 
63 
Overcast; strong wind, S. 
10.15 
, . 
49 
2-9 
2-6 
, , 
63 
Ditto, S.S.W. 
11.15 
52 
49 
3-3 
2-6 
6*5 
4-8 
Ditto. 
12.15 p.m. 
, . 
49 
3-2 
2-8 
3-2 
1-7 
Ditto. Wind rather more from West. 
1.15 
53 
51 
41 
2-6 
. . 
4-8 
Ditto. Wind S.W. 
2.15 
54 
49 
3-3 
22 
71 
70 
Ditto. 
3.15 
, , 
48 
2-9 
2-4 
96 
5-6 
Ditto. 
4.15 
49 
46 
32 
2-2 
29 
5-3 
Rain. Wind fallen. 
5.15 
48 
44 
2-7 
2-2 
62 
51 
Ditto. 
6.15 
47 
42 
32 
2-6 
39 
, . 
Ditto. No wind. 
7.15 
, . 
41 
32 
1-9 
. , 
4-4 
Ditto. 
8.15 
. . 
40 
30 
1-7 
3-3 
29 
Ditto. 
9.15 
43 
40 
3-8 
24 
2 5 
41 
Ditto. 
10.15 
43 
39 
33 
1-7 
. . 
1-9 
Rain stopped. Wind rising. 
11.15 
. . 
40 
32 
1-7 
39 
2-2 
Ditto. Wind higher. 
12.15 a.m. 
42 
39 
, . 
1-7 
6-8 
too small 
Drizzling rain. Wind less. 
1.15 
, # 
39 
, . 
1-7 
, . 
Fine, overcast, little wind. 
2.15 
41 
38 
36 
1-7 
50 
Fine, and nearly clear. Wind slight. W. 
3.15 
, , 
38 
41 
1-7 
64 
Ditto. 
4.15 
, , 
37 
, a 
1-7 
, , 
3-1 
Ditto. 
5.15 
38 
36-1 
41 
1-7 
6-3 
4-4 { 
Ditto. Mill fires lighting up in the town, 
and a good deal of smoke about. 
6.15 
1 
37 
36 
41 
1-7 
8-1 
6-6 
Ditto. 
night, when the carbonic acid is generally said to be lowest. Dundee is also close to 
the open sea, and without any large town near it, Fodor (‘ Hygienische Untersuch- 
ungen,’ 1881), from a large number of observations, gives the limits as 2 to 6 
