The true mushroom itself is to a great extent a dung-borne species, therefore mushroom-beds are always liable to an invasion from other dung-borne forms. The spores of all fungi are constantly floating about in the air, and when the spores of dung-infesting species alight on a mushroom-bed they find a nidus already prepared that exactly suits them; and if the spawn of the new-comer becomes more profuse than that of the mushroom the stranger takes up his position at the expense of the mushroom.
The best modern edition of the works of Aquinas is that prepared at the expense of Leo XIII.
The common people, whom he had always favoured at the expense of the boyars, thereupon implored him to come back on his own terms. He consented to do so, but entrenched himself within a peculiar institution, the oprichina or "separate estate."
Algiers is the chief coaling station in the Mediterranean, having become so largely at the expense of Gibraltar.
In order to see whether the heat came out of the chips he compared the capacity for heat of the chips abraded by the boring bar with that of an equal quantity of the metal cut from the block by a fine saw, and obtained the same result in the two cases, from which he concluded that "the heat produced could not possibly have been furnished at the expense of the latent heat of the metallic chips."
