30, 
On tlie Rain and Drainage - Waters at Rotliamsted. 
Table XL VI. — Chlorine in Broadbalk Drain age- Waters at different 
the Year, with the Average Amount in Three Years (1878-9 to 
parts per Million. 
Seasons o: 
1880-1), ii 
Date of RrxsisG. 
Plots. 
2. ! 3c&4. 
10. 
11. 
12. 
13. 
14. 
15. 16. 17. 18. ,19 
Winter (October 15— March 10), 1878-9. 
November 28 
February 16 
Mean 9 runnings 
6-8 5-1 5-4! 
8-0 «-5 12-8 17-6 36-7 8-6[23'6 25-4 25-6} 25-91 22-lj 51-5 
3-6 4-0 8-0 8-4 14-6 4-2 10-6 10-1 9-9 IImI 11-0 23-9 
1 9-2 17-6, 5-0 12-9 14-0)13-4 14-1 13-2 30-1 
19-2 6-7 8- 
10-8 4-2 .. 
Spring (March 11— May 30), 1879. 
April 7 
May 29 
• Mean 3 runnings 
4-4 4-9 63-o'l02-4 91*4 12-4'70-6 61-2 83-4 101'4 119-2 14-4 
1-5 2-4 2-6 18-6 45-5 70-Oj 6-9i59-9 71-7 65-51 66-2 69-6 8-0 
1-5 3-6 3-8 40-6 69-6 73-7 9-0 66-6 60-1 71-3 82-2 98-4 9-8 3-6i 6-0 
4-7 
2-7 
8-0 
5-6 
160-0 
51-0 
StiMsiEK (June 1 — Septem'ber 3), 1879. 
Mean 9 runnings 
0-4 
2-3 
1-7 
3-l' 23-6 
1-8| 10-2 
43-0 
18-4 
53-4 
26 2 
7-6 
2-1 
61'4|66-9 
19-6 20-8 
39-8 
22-2 
631 
23-7 
43-3 
25-5 
12-1 
5-3 
1-5 
7-3 
3-4 
56-7 
19-7 
0-3 
1-3 
1-5 11-8 
20-3 30-7 
3-1 
29-6j31-9 
30-7 
30-8 
31-4 
6-0 
1-9 
3-9 
26-0 
1- 
Autumn (September 4— October 21), 1879. 
5-8 j 5-l| 13-3 17-6 
.. 1 5-4|16-7jl7-6'lS-3 
18- 1 
•• 
3-3 
16-2| .. 
Winter (October 22— March 8), 1879-80. 
Feb. 16,17, 19 (Mean') 15-7 
9-9 j 11-7] 15-0| 17-6 
22-5 10-7 15-7|20-5j21-4 
23-0 
21-o|l20-3 
10-0 
9-9 
21.7, 
15- 
Spring (March 9— May 30), 1880. 
6-9 1 7-oj 51-2jl38-8 
1 98-njlO-oj90-Oj55-2j57-5 
92-7| .. 
6-8 
96-0 
•• 
•• 
Autumn (August 14— October 24), 1880. 
September 14 . . . . 
Mean 5 runnings 
12-3 
11-6 
5-4 
12*2 
5-2 
37-1 
14-3 
77-6 
21-4 
167-2 
34-3 
12-ol64-7]85-4 
5-6l27-8!33-7 
81-3 102-8 
32-8t 37-8 
79-2 
34-6 
21-9 
19-6 
9-3 
4-7 

52-2 
27-3 
15-7 
9-2 
8 
S 
8-0 
8-2 
7-7 
19-9' 41-4 
68-3 
8-3 38-2 52-9 
49-6 60-1 
48-0 
24 4 
6-7| 42-3 
11-6 
Winter (October 25— March 11), 1880-1. 
Oct. 27, 28, 29 (Mean) 
Mar. 5, 6, 7 (Mean) 
Mean 17 runnings 
9-2 
2-7 
5-7 
4-3 
7-0 
4-4 
13-0 
8-1 
23-6 
9-8 
28-6 
10-8 
5-9 
4-2 
20-7 
90 
24-7 22-7 
9-8 8-7 
26-3 
9-4 
22-8 
8-7 
101-4 
14-2 
7-1 
4-2 
20-6 
7-1 
6-7 
4-5 
7 
4 
E 
5-9 
4-7 
5-1 
9-2 
13-1 
15-2 
4-6 
12-7jl4-5 12-8 
14-5 
13-2 
39-5 
5-3 
11-6 
5-7 
Autumn (August 8 — October 27), 1881. 
Mean 4 runnings 
6-0 
9-2 
6-2' 44-6 
8-6j 17-4 
61-0 
28-9 
45-1 
12-1 
70'8]67-2l79-4 
29-7l42-4!42-8 
1 
77-6 
38-0 
40-6 18-4 
4-S 
9-6 
6-6 
130 
27-5 
1 
7-7 
7-6 35-9 
45-0 
45-1 
12-1 
53-5 62-3 69-5 
62-3 
40-6 18-4 
i 
7-6 
12-1 
27-5 1 
Average of Three Years (November 1878 — October 1881). 
Plots. 
2. 
3&4. 
5. 
6. 
7. 
8. 
9. 
10. 
11. 
12. 
13. 
14. 
16. 
16. 
17 6 
Am. 
; 18. 
Min. 
6-2 
Mfan of 49 (or ^ 
fewer) runnings) 
6-1 
4-9 
5-2 
14-0 
23-1 
30-8 
24-2126-1 
25-7 
28-9 
27-8 
32-6 
6-1 
25-4 
