More elaborate analyses of the same fluid have since been made by Dr.
Voelcker, with the subjoined results per gallon:--

1. 2. 3.
Organic matters and ammoniacal } 263.80 250.63 70.121
salts }
Silica 2.49 9.98 1.154
Oxide of iron 0.70 0.68 ...
Lime 5.34 25.18 13.011
Magnesia 2.96 15.33 1.660
Potash 103.23 112.26 13.411
Chloride of potassium 72.00 77.38 7.712
Chloride of sodium 17.18 46.03 17.258
Phosphoric acid 2.70 9.51 2.304
Sulphuric acid 22.31 37.60 3.408
Carbonic acid, and loss 33.90 27.95 14.025
------ ------ -------
Total solids 526.61 612.53 144.064
Ammonia 114.16 22.31 26.647

The differences are here very remarkable, especially in the quantity of
ammonia, which is exceedingly large in the first sample. All of them are
particularly rich in potash, and contain but a small proportion of
phosphoric acid. The general inference to be deduced from them is, that
liquid manure is a most important source of the alkalis and ammonia, and
must be peculiarly valuable on soils in which these substances are
deficient.

The system of liquid manuring, originally introduced by Mr. Kennedy of
Myremill, Ayrshire, and which has since been adopted in some other
places, differs from liquid manuring in its _strict_ sense, for not only
are the drainings of the manure-heap employed, but the whole solid
excrements are mixed with water in a tank, and rape-dust and other
substances occasionally added, and distributed through the pipes.

It has been abandoned on Mr. Kennedy's farm, but is in use at Tiptree
Hall, and on the farm of Mr. Ralston, Lagg, where the fluid is
distributed by gravitation.

The arrangements employed by Mr. Mechi are identical with those formerly
in use at Myremill. The greater part of the stock is kept on boards, and
the liquid and solid excrements are collected together in the tank, and
largely diluted before distribution. The liquid from the tanks has been
recently examined by Dr. Voelcker, who fou