oods of Hynesboro' Park, Maryland, with relation to spawn culture, an
account of which may prove of interest to students in this line of
investigation. Several loads of stable manure and oak-leaf bedding were
well mixed and formed into a mound about three feet in height, having a
diameter of six feet, and tapering to about four inches in depth at the
outer edge. The mass was quite moist and slightly tamped to give it
general consistency. It was exposed to the open air, without protection,
during the months of September, October, and November. In the meantime,
frequent rains occurred. On examination it was found that the rains did
not penetrate to a depth of more than four inches. On opening up the
centre of the mound, it was observed that the portion thus exposed
consisted of highly decomposed leaves, and presented a white mass of
matted, "burned" mycelium. It was evident that the temperature at that
point had risen considerably above 100 Fahr. The mycelium was,
doubtless, produced in abundance before the temperature reached 100
Fahr. and became scorched as the temperature increased. On examining the
outer edges, where the depth was only twelve inches, I found an
abundance of mycelium which did not show any appearance of having been
scorched by undue temperature. Since no mycelium had been added to the
mound, it is evident that the spores which produced it must have been
present, although unobserved, and awaiting only the proper conditions
for development, _i. e._, for budding and the production of mycelium. At
the end of the third month, groups of the common meadow mushroom,
Agaricus campestris, together with some fine examples of Tricholoma
terreum, an edible mushroom, common to these woods, appeared on the
edges of the mound.

APPENDIX A.

CONTINUATION OF GLOSSARY OF TERMS USED IN DESCRIBING MUSHROOMS.

_Maculate_, spotted.

_Marginate_, having a distinct border.

_Matrix_, the substance upon which a mushroom grows.

_Medial_, at the middle; of the ring of a mushroom which is between
superior or near the apex of the stem, and distant or far removed from
the apex.

_Merismoid_, having a branched or laciniate pileus.

_Moniliform_, contracted at intervals in the length, like a string of
beads.

_Multifid_, having many divisions.

_Multipartite_, divided into many parts.

_Mycelium_, the delicate threads proceeding from the germinating spores,
usually white and popularly termed spawn.

_Narrow_