Mushroom cave, 70 ft

under ground, near Paris, sisting of a mixture of manure and loam, and flat or ridged. The newly made bed will soon warm up to 110° F. and is then ready for spawning. This consists in inserting bits of the spawn into the bed, from which the filaments of the mushroom develop until the whole bed is filled with them, and afterward produce the mushrooms. The spawn consists of portions of a mushroom bed well stocked with the vegetative filaments of the mushroom that have been cut into "bricks" and dried. The bed could be seeded with the spores from gills of ripe mushrooms, but a much longer time would be required. The spawn is made on a large scale by some growers, most extensively in France, and the "bricks" are a regular article of trade at the seed stores. The only safe rule to follow in selecting toadstools is never to use a species about which there is any doubt, to become familiar with the mushroom and a few other edible sorts, and to discard all others. They should be used while fresh. Avoid those which have a milky juice, or change color when cut, or have bright colors. It