Chap. III. Alkalies and Alkaline Salts. 363
fill the space of 48 oz. previously marked on the receiver,and keep it in phials perfectly closed, by dipping their neckswhen corked in wax.
We have already mentioned the properties of ammonia inits gaseous form. When combined with water, it imparts toit many of these properties, and lessens its specific gravity.
Table of the quantities of Reul or Gaseous Ammonia in solutions ofdifferent Specific Gravities. (Dalton.)
Specific
Grains of ammo-
Grains of ammo-
I Boiling point
Volume of gas
Gravity.
nia in 100 watei
nia in 100 grains
of the liquid.
condensed in
grain measures
of liquid.
a given vol.
of liquid.
Falir. scale.
of liquid.
.S5
30
■35.3
26°
491
.86
28
32.6
38
456
•87
26
29-9
50
419
.88
24
27.3
62
38J
• 89
22
24.7
74
3-If
•90
20
22.2
86
311
•91
18
19-3
9S
277
•92
l 6
17-4
110
244
•93
14
15-1
122
2! 1
•94
12
128
134
180
■95
10
10.5
3 46
147
■96
8
8.3
158
ll6
■97
6
6.2
J 73
87
■98
4
4-1
187
57
-99
%
n
196
2S
Sir Humphry Davy's results were somewhat different.He found 100 parts of sp. gr. 0.875, to contain 32.5 of am-monia ; of sp. gr. 0.9054, 25.37 ; and of sp. gr. 0.9692, 9.5of ammonia.
Water of ammonia decomposes many of the earthy, andall the metalline salts, and is capable of dissolving, or combi-ning with, many of the metalline oxides, and even ofoxydiz-ing some of the metals. When pure, water of ammonia doesnot effervesce with any of the acids, or form a precipitatewith alcohoL As it readily absorbs carbonic acid from theatmosphere, the Edinburgh college, very properly, order it tobe kept in small phials. By neglecting this precaution inthe shops, it often becomes carbonated before the lai - ge bot-tles, in which it is commonly kept, be half done.
Medical use. —Water of ammonia is very rarely given in-ternally, although it may be used in doses of ten to twenty