As the Rev. M. J. Berkeley remarks:--“It is almost useless to advert to the notion, though a very common one, which would regard these productions as the creatures of chance or of a happy concurrence of circumstances favourable to their growth from inorganic elements. It is true they often occur in unexpected situations, and from their extreme rapidity of development seem as if they could not have originated from anything like seed. But, as accurate inquiry has now thrown much light on the mystery in which the origin of intestinal worms was lately involved, so the phenomena which attend the growth of fungi are gradually receiving light, and they are found to follow essentially the same laws as more perfect vegetables.” It is, in fact, quite fair to conclude that mushrooms, like most other plants, occupy but a small space in the vast expanse of soil and site which are naturally adapted for their growth. I read in a gardening journal that “it is impossible to command a crop of out-door mushrooms.” I am positive that it can be done with almost as much certainty as any other crop, provided we take into consideration certain conditions. Of course, we must remember its natural wants; the more we do so, the more certain of success we may be. We know that it grows most abundantly in rich, upland pastures where water does not lie, associated with the meadow foxtail, meadow and hard fescue and cock’s-foot grasses, clovers, cowslips, daisies, yarrow, &c., and also with the thistles (_Cnicus lanceolatus_ and _C. arvensis_), and other plants fond of similar soils. We know that it is rarely found where the marsh plume-thistle (_Cnicus palustris_), tufted hair-grass, and other marsh grasses and plants abound, and from the presence or absence of these plants we may easily make up our minds as to the positions that suit it best. Now, it has long since been proved in gardens that it is quite possible to cultivate plants to a much higher degree of perfection than they ever attain in a wild state, under conditions entirely different, and it is not improbable that we should be able to grow the common mushroom in soils and positions far removed from those in which it naturally occurs. But there is no occasion for anything of the kind. It loves well-drained and dry pastures and meadows, and is not the country covered with such?