, and Swine.

Phos(phoric) Acid.

-----------+----------------------------+----------------------------
| Solids | Urine
One ton +---------+---------+--------+---------+--------+---------
(2000 lbs).| | Phos. | | | Phos. |
|Nitrogen.| acid. |Potash. |Nitrogen.| acid. |Potash.
-----------+---------+---------+--------+---------+--------+---------
Human |20.0 lbs.|21.8 lbs.|5.0 lbs.|12.0 lbs.|3.7 lbs.| 4.0 lbs.
-----------+---------+---------+--------+---------+--------+---------
Mean of | | | | | |
horse, cow,| | | | | |
sheep, and | | | | | |
swine | 9.4 " | 6.2 " |4.3 " |22.5 " |0.4 " |25.4 "
-----------+---------+---------+--------+---------+--------+---------

One ton of fresh faeces contains more than twice as much nitrogen, and
more than three times as much phosphoric acid, as a ton of fresh mixed
animal-dung. The nitrogen, too, is probably in a more available
condition than that in common barnyard-dung; and we should not be far
wrong in estimating 1 ton of faeces equal to 2-1/2 tons of ordinary
dung, or about equal in value to carefully preserved manure from
liberally-fed sheep, swine, and fattening cattle.

"It is an unpleasant job," said the Deacon, "but it pays well to empty
the vaults at least twice a year."

"If farmers," said the Doctor, "would only throw into the vaults from
time to time some dry earth or coal ashes, the contents of the vaults
could be removed without any disagreeable smell."

"That is so," said I, "and even where a vault has been shamefully
neglected, and is full of offensive matter, it can be cleaned out
without difficulty and without smell. I have cleaned out a large vault
in an hour. We were drawing manure from the yards with three teams and
piling it in the field. We brought back a load of sand and threw half of
it into the vault, and put the other half on one side, to be used as
required. The sand and faeces were then, with a long-handled shovel,
thrown into the wagon, and drawn to the pile of manure in the field, and
thrown on to the pile, not more than two or three inches thick. The team
brought back a load of sand, and so we continued until the work was
done. Sand or dry earth is cheap, and we used all that was necessary to
prevent