. Edinburgh journal of natural history and of the physical sciences . The existence of volcanos in the moon must therefore be considered as fairly esta- blished by observation. Independently of these observed facts, analogy would lead us to expect that the same laws which are found to regulate the internal constitution of our globe should also prevail in the other heavenly bodies. MISCELLANEOUS. HuMA^- Horns.— Excrescences of a horny nature have been occasionally observed on the human head. A portrait of a woman with excrescences of this description is deposited in the British Museum, and one
. Edinburgh journal of natural history and of the physical sciences . The existence of volcanos in the moon must therefore be considered as fairly esta- blished by observation. Independently of these observed facts, analogy would lead us to expect that the same laws which are found to regulate the internal constitution of our globe should also prevail in the other heavenly bodies. MISCELLANEOUS. HuMA^- Horns.— Excrescences of a horny nature have been occasionally observed on the human head. A portrait of a woman with excrescences of this description is deposited in the British Museum, and one of the horns is, we believe, still pre- served in the Museum at Oxford. A far more recent instance, however, was observed by Dr Wm. Roots, of King- ston-npon-Thames, who, in February 1811, amputated an excrescence of this sort, exactly resembling a ra7iis horn, from the head of a man, between fifty and sixty years of ago, a drawing of which, in its growing state, as well as the horn itself, were presented by him to the collection of Sir Astley Cooper. The account given by Dr Roots of this extraordinary case is, that John Kennedy, a gardener at Thames-Ditton, in Surrey, in the year 1796, had a tumour growing on the superior part of the occiput, which was taken off with the knife by the Doctor's father in about three years from its commencement. Soon after its removal, a horny substance began to make its appearance on the same place, which continued "-rowing for four years, till it accidentally fell off in a most unexpected manner, beino- at that time not more than three inches in length; and it should be observed, that the surface of the part it grew from, on its dropping off, was perfectly smooth, without the shghtcst hemorrhage, and resembling the superficies of the stag's head when his horns have recently dropped. In a short time afterwards, a new horny sprout shot forth which, as it grew, took on the exact form and crooked figure of the ram's horn. Having increased du
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