r term.

[249] The amount of "reverted" phosphate is estimated by _the ammonium
citrate process_.

[250] See Note I., p. 553.

[251] See Note II., p. 554.

[252] See Note III., p. 556.

[253] See Chapter on Farmyard Manure, p. 271.

[254] See Note IV., p. 557.

[255] See Chapter on Farmyard Manure, pp. 224-236.

APPENDIX TO CHAPTER XXV.

NOTE I. (p. 543).

USEFUL FACTORS FOR CALCULATING THE PERCENTAGE OF IMPORTANT MANURIAL
INGREDIENTS IN A MANURE INTO THEIR DIFFERENT COMPOUNDS. (From the
'Transactions of the Highland and Agricultural Society.')

----------------------------+------------+----------------------
| Multiplied | Gives corresponding
Amount of | by | amount of
----------------------------+------------+----------------------
Nitrogen | 1.214 | Ammonia.
" | 6.3 | Albuminoid matter.
Ammonia | .824 | Nitrogen.
" | 3.882 | Sulphate of ammonia.
" | 3.147 | Muriate of ammonia.
" | 3.706 | Nitric acid.
" | 5.0 | Nitrate of soda.
Potash (anhydrous) | 1.85 | Sulphate of potash.
" | 1.585 | Muriate of potash.
Phosphoric acid (anhydrous) | 2.183 | Phosphate of lime.
" " | 1.4 | Biphosphate.
" " | 1.648 | Soluble phosphate.
Soluble phosphate | 1.325 | Phosphate of lime.
Biphosphate | 1.566 | "
Lime | 1.845 | "
" | 1.786 | Carbonate of lime.
Chlorine | 1.648 | Chloride of sodium.
----------------------------+------------+----------------------

NOTES II. (p. 545).

UNITS TO BE USED IN DETERMINING THE COMMERCIAL VALUE OF
MANURES.

_For Season 1893._

A: Ichaboe.
B: Peruvian (riddled).
C: Fish guano.
D: Frey Bentos guano.
E: Steamed bone-flour.
F: Dissolved or vitriolated bones.
G: Superphosphates.
H: Genuine.
I: Genuine.
J: Average.

-----------------+-----------+-----------------+-----------+
| Guanos. | Scrap manures. | |
Items to be +-----+-----+-----+-----------+ Bone-meal.|
valued. | A | B | C | D | |
-----