Edinburgh journal of natural history and of the physical sciences edinburghjournal01macg Year: 1835 AND OF THE PHYSICAL SCIENCES. 87 to the hands, where it is found beneath the epidermis, but is also sometimes met with on the feet, in the arm-pits, and other places. It is never found on persons affected with any other cutaneous disease than itch. The insects are all destroyed after the sulfuro-alcaline ointment has been applied; but the patient may not be still cured, for the eruption may remain, unless it be properly treated. Insects removed from an affected to a sound person, multiply on t
Edinburgh journal of natural history and of the physical sciences edinburghjournal01macg Year: 1835 AND OF THE PHYSICAL SCIENCES. 87 to the hands, where it is found beneath the epidermis, but is also sometimes met with on the feet, in the arm-pits, and other places. It is never found on persons affected with any other cutaneous disease than itch. The insects are all destroyed after the sulfuro-alcaline ointment has been applied; but the patient may not be still cured, for the eruption may remain, unless it be properly treated. Insects removed from an affected to a sound person, multiply on the skin of the latter, when presently the eruption appears. M. Gras several times communicated the disease in this manner; once, at the desire of Dr Pariset, secretary of the Aca- demic de i\I«dicine, when it produced a sanatory revulsion in a young girl who had fallen into a state of stupor. On the other hand, he several times tried to inoculate himself with the serum of the itch vesicles, but without success. He therefore con- eludes that the sarcoptes is the sole agent in producing the contagion of itch, which is not contracted unless that animal or its eggs adhere to the skin or clothes of per- sons coming into contact with those having the disease. The number of insects on a person has no relation to the extent and intensity of the eruption ; for sometimes not more than five or six are found on individuals co- vered with vesicles and pustules; and again, a hundred have been taken from the faands of a person, who yet had only a few vesicles. BOTANY. Alleged Irritability evinced by the Stems of Plants when slit—Mr Goldin'' Bird has endeavoured, in Loudon's Magazine for February, to explain the c-etraction observed by the two portions of a slit stem or stalk, on the principle of endosmosis. If a portion of the stem of an herbaceous exogenous plant be divided longitudinally, the division extending to the length of about two inches, the divided portions will instantly separa
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