Mushrooms

Take partially dry horse manure and lay it in a heapto ferment. Turn and mix it well every few days, and when well and
equally fermented, which will be from ten to fourteen days, make it
into a bed 4 ft. wide and 2 ft. deep, mixing it well together and
beating or treading it firmly. When the temperature of the bed falls
to 75 degrees, or a little under, the spawn may be inserted in pieces
about the size of a walnut, 2 in. deep and 6 in. apart. Now give
a covering of loamy soil, 2 in. deep, and beat it down evenly and
firmly. Finish off with a covering of clean straw or hay about 1 ft.
thick. Water when necessary with lukewarm water; but very little
should be given till the Mushrooms begin to come up, then a plentiful
supply may be given. They may be grown in any warm cellar or shed, and
usually appear in from four to six weeks after planting.