236 
PROCEEDINGS OF SECTION B. 
TABLE No. 1. 
Nine Bottles each of Garden Tank, Laboratory Tank, and Distilled Water. 
Put up on 9th October, 1876. 
Temperature 
(Fahrenheit). 
- 
Garden Tank. 
Laboratory Tank. 
Distilled Water. 
Morn- 
ing. 
Even- 
ing. 
Nos. 
Date. 
Parts per 1,000,000 
Parts per 1,000,000. 
Parts per 1,000,000. 
Free 
nii 3 . 
Alb. NH 3 . 
Free 
nh 3 . 
Alb. NII 3 . 
Free 
nh 3 . 
Alb. NH 3 . 
68° 
70° 
1 
October 11 ... 
•oi 
*09 
*35 
T84 
•07 
*04 
68° 
70° 
2 
12 ... 
•005 
•042 
•25 
•08 
•09 
•036 
68° 
69° 
3 
13 .. 
•01 
•04 
*24 
*094 
*05 
*03 
65° 
66° 
4 
14 ... 
*01 
•04 
*?2 
T1 
•07 
*03 
67° 
67° 
5 
16 ... 
•01 
•054 
•23 
•090 
*04 
•01 
71° 
71° 
6 
17 ... 
*01 
*04 
•23 
*08 
•04 
*005 
70° 
68° 
7 
19 ... 
•005 
•03 
•22 
*06 
•Of 
*005 
70° 
70° 
8 
20 ... 
•005 
*02 
•22 
•084 
•03 
*005 
71° 
70° 
9 
21 ... 
•005 
•02 
*21 
•07 
•005 
•005 
In all of these, with slight variations, there was gradual improvement on keeping. 
The laboratory tank (in the roof) at the time of these experiments was supplied 
with rain-water from the slate roof of the main building. . The garden tank (under- 
ground) was also supplied from the same source. It is noticeable that there are con- 
siderable differences between the laboratory tank and the underground garden tank 
waters, although both from the same roof. 
TABLE No. 2. 
Five Bottles each of Garden Tank, Laboratory Tank, and Distilled Water. 
Put up on 18th October, 1876. 
Temperature 
(Fahrenheit). 
— 
Garden Tank. 
Laboratory Tank. 
Ordinary Distilled 
Water. 
Morning. 
Evening. 
"" 
Nos. 
Date. 
Free NH 3 
Alb. NH 3 
Free NH 3 
Alb.NH 3 
Free NH S 
Alb. NH 3 
67° 
« 
65° 
1 
Oct. 18 
•005 
•04 
•018 
*07 
•036 
•002 
70° 
68° 
2 
„ 19 
■005 
•03 
T3 
*06 
*030 
•005 
72° 
70° 
3 
Nov. 1 
•005 
*01 
*15 
*06 
•005 
*005 
76° 
78° 
4 
„ 16 
•005 
•01 
■15 
*06 
•005 
•005 
71° 
73° 
5 
„ 20 
*005 
•005 
T4 
•06 
•ooo 
•005 
Note. — Heavy rain fell for about two hours on the morning of the 18tli, just before collecting 
these samples. 
TABLE No. 3. 
Seven Bottles each of Garden Tank, Laboratory Tank, and Distilled Water. 
Put up on 23rd October, 1876. 
Temperature 
(Fahrenheit), 
- 
Garden Tank. 
Laboratory Tank. 
Distilled Tank. 
Morning. 
Evening. 
Nos. 
Date. 
Free Nil 3 Alb. Nil 3 
Free NH 3 
Alb. Nn 3 
Free NJI a 
Alb. NH S 
72° 
72 G 
74° 
75° 
68° 
68° 
67° 
70° 
-75° 
76° 
76° 
67° 
69° 
68° 
1 
2 
3 
4 
5 
6 
7 
Nov. 1 
„ 21 
„ 22 
„ 23 
„ 25 
„ 28 
„ 30 
*005 
•005 
•005 
•005 
•005 
*005 
*005 
•01 
•005 
*005 
•005 
•005 
*005 
*005 
•06 
•04 
•04 
•04 
•06 
*07 
*06 
•04 
*05 
•04 
*05 
*05 
•03 
•03 
•005 
*005 
•01 
•01 
•005 
*005 
•005 
•005 
•005 
*005 
*005 
‘005 
*005 
*005 
Note. — N o rain since 18th October. 
