magnesium (MgNH_{4}PO_{4}6Aq) is formed. While such a reaction is
possible, it is highly improbable that it takes place to any extent. The
double phosphate is a crystalline salt which only separates after a
considerable time, and in the presence of a large excess of ammonia.

NOTE XI. (p. 250).

ANALYSES OF COW-MANURE.[181]

----------------+-------+-------+-------+-------+-------+-------+--------
| 1. | 2. | 3. | 4. | 5. | 6. |Average.
+-------+-------+-------+-------+-------+-------+--------
Water | 85.30 | 77.71 | 74.02 | 72.87 | 75.00 | 77.50 | 77.06
Dry matter | 14.70 | 22.30 | 25.98 | 27.13 | 25.00 | 22.50 | 22.93
Ash ingredients | 2.04 | 4.71 | 3.94 | 6.70 | 6.22 | 2.20 | 4.30
Potash | 0.36 | 0.46 | 0.56 | 1.69 | 0.39 | 0.40 | 0.64
Lime | 0.29 | 0.37 | 0.58 | 0.41 | 0.24 | 0.31 | 0.48
Magnesia | 0.19 | 0.11 | 0.13 | - | 0.18 | 0.11 | -
Phosphoric acid | 0.16 | 0.13 | 0.07 | 0.20 | 0.14 | 0.16 | 0.14
Ammonia | 0.06 | 0.16 | 0.07 | - | 0.27 | - | 0.14
Total nitrogen | 0.38 | 0.54 | 0.41 | 0.79 | 0.46 | 0.34 | 0.48
----------------+-------+-------+-------+-------+-------+-------+--------

NOTE XII. (p. 259).

COMPOSITION OF FRESH AND ROTTEN FARMYARD
MANURE (VOELCKER).

Composition of fresh manure, composed of horse, cow,
and pig dung, about fourteen days old:--

Water 66.17
* Soluble organic matter 2.48
Soluble inorganic matter 1.54
+ Insoluble organic matter 25.76
Insoluble inorganic matter 4.05
------
100.00
------
* Containing nitrogen .149
Equal to ammonia .181
+ Containing nitrogen .494
Equal to ammonia .599
Total percentage of nitrogen .643
Equal to ammonia .780
Ammonia in a volatile state .034
Ammonia in form of salts .088

Comp