drying by exposure to hot air, the three layers of soil weighed:

The upper six inches, one foot square 49-3/4 lbs.
The next " " 50-1/2 "
The third " " 51-1/4 "
===========

"Equal portions of the dried soil from each six-inch section were mixed
together and reduced to a fine powder. An average sample thus prepared,
on analysis, was found to have the following composition:

Composition of Clover-Soil Once Mown for Hay, and Afterwards Left for
Seed. Dried at 212deg. Fahr.

{ Organic matter 5.34
{ Oxides of iron 6.07
{ Alumina 4.51
{ Carbonate of lime 7.51
Soluble in { Magnesia 1.27
hydrochloric Acid { Potash .52
{ Soda .16
{ Chloride of sodium .03
{ Phosphoric acid .15
{ Sulphuric acid .19

{ Insoluble silicious matter,
{ 73.84. Consisting of:
{ Alumina 4.14
{ Lime (in a state of silicate) 2.69
Insoluble in acid { Magnesia .68
{ Potash .24
{ Soda .21
{ Silica 65.88
-----
99.59
=====

"The soil, it will be seen, in general character, resembles the
preceding sample; it contains a good deal of potash and phosphoric acid,
and may be presumed to be well suited to the growth of clover. It
contains more carbonate of lime, and is somewhat lighter than the sample
from the part of the field twice mown for hay, and may be termed heavy
calcareous clay.

"An acre of this land, 18 inches deep, weighed, when very nearly dry:

Lbs.
Surface, six inches 2,407,900
Next " 2,444,200
Third " 2,480,500

"Or in