(From Boletus 1454 a mass). Spunk. A genus of the fungi. It is an horizontal fungus; and porous underneath. The boletus igniarius is commonly called agaric of the oak.

Boletus cervi. See Amanita.

Boletus pini laricis. See Agaricus.

Since the article on agaricus was printed, we have received a very laboured and interesting analysis of the white agaric, and agaric of the oak, from M. Bouillon La Grange, in the 151st number of the Annales de Chimie, of which we shall here give a short abstract.

He found the white agaric to contain an uncombined acid. Water dissolved a small quantity of extractive matter, as well as sulphates of potash and of lime, some muriat of potash, and an animal matter. When distilled in close vessels, acetat and carbonat of ammonia were formed. When burnt, he discovered, in the cinders, carbonats of potash and of lime, muriat of potash, sulphat of lime, phosphat of lime, and some iron.

With the assistance of nitric acid, the malic and oxalic acids were formed with a spermaceti, mixed with resin; alcohol extracted a large proportion of acid resin, which was the benzoic acid. Caustic alkalis separated a considerable quantity of ammonia.

From the agaric of the oak water took up an extractive matter, with sulphat of lime, and muriat of potash. In the cinders, when burnt, were found phosphats of lime and magnesia, with some iron.

With the nitric acid, the malic and oxalic acids were alone discovered. Alcohol dissolved only a small proportion of resin, and caustic alkalis disengaged a much less proportion of animal matter than from the white agaric.