OF THE CAUSES 568 chia, and haemorrhoids, or any other great haemorrhage, will often occafion violent fymptoms of this kind. Hippocrates has obferved, that convulfions may arife from innanition, as well as repletion: And,as the flrength and firmnefs of the whole body depend upon proper fluids, and a due quantity of them, may not very irregular and flrange diforders happen from a want of blood, or from a too watery ftate of it, efpecially in thofe whofe nervous fyftem is very delicate and eaflly affefled ? For, when there does not remain in the veflels a quantity of blood fufE- cient for carrying on the feveral functions in a proper manner, the regular circulation of all the fluids mull be difturbed, and the di- ftribution or exertion of the nervous moving power will become ir¬ regular. But, in whatever way great lofs of blood may give rife to nervous difeafes, we are fo certain of the fafl from experience, that perhaps the following cafes in proof of it may be thought ftlperfluous. i. A young gentleman of 17 years of age, complaining of a pain in his right fide after a fall from his horfe, was blooded very large¬ ly. Some days after, he felt a coldnefs in his ftomach, which was foon fucceeded by fits of violent pain and fpafms in that part, fometimes lading twenty minutes, or half an hour, at a time. Thefe fymptoms returned after no regular intervals, but generally twice, or oftener, in 24 hours ; and gradually increafed to fuch a height, that the patient was obliged to be held down in bed by two or three people, in order to prevent his tearing his hair, and doing himfelf other mifchief. The pain and cramps were always prece¬ ded with a fenfation of coldnefs in the flomach, and frequently went oft in an inflant. Ginger with hot brandy felt cold in the flomach at the acceflion of the fit. After the patient had differed in this manner for three weeks, the diforder gradually abated ; and, by ufing a few ftomachic medicines, a proper diet, and exercife,he per¬ fectly recovered. On another occafion, after lofing a good deal of blood, he was attacked with the fame fymptoms, but in a much lefs violent de¬ gree. 2.