nicenefs and precifion. Dr. Jenner's,. c; Enquiry into the Caufes and. Effetls of the Variola Vaccina’'' is extremely curious, and much benefit, it is probable, will refult to the public from the profecution, which he promilcs, of his inveftigations. This dileafe was difcovered in fome of the wcftern counties of England, and is, known by the name of' the Cow-Pox : it bears a very linking rcfem-b lance in its fymptoms,' its appearance, and in the nature, though happily not in the degree, of, its effeds, to the fuiali-pox : the principal difference coniifts in this, that the fluid of the cow-pox remains limpid nearly to the time of its total difappearance, and never becomes purulent, as in the dired fmail-pox, and that the former ‘is local, while the latter is general. The difeafe appears on the hippies of cows, in livid irregular puftules, furroundedby inflammation; it is communicated to thole em*ployed in milking, and any perfon who has been once affeded with it, will never afterwards take the fmall-pox, either by expofure to variolous effluvia or by the inoculation. From the eflablifhment of this very important fad, Dr. Jenner purpofes to iubilitute the inoculation of the cow-pox, for that of the fmall-pox ; the following advantages are Hated to re-fult ; ill, It clearly appears that the former procels wouid leave the conftitution in a Hate of perfed lecurity from the in-fedion of the fmali-pox. zdly, In the cow-pox no eruption of ~puflules takes place over the body. 3dly, The difeafe when received, cannot be communicated ta other perlons by effluvia; nor perhaps by iimple contad unlels there be fome abralion of the cuticle. 4thly, No fatal effeds have ever been known to arifc from the cow-pox, even when imprefled in the inoH unfavourable manner. It is ardently to be hoped that this fubjed will meet with that minute attention which- its extraordinary coniequence demands. A lecond and correded edition is publilhed of Dr. Hamilton’s very ule-tul work, on lt;c The Duties of a Regimental Surgeon, cd\ It will excite no furprile that a great deal of curious and valuable matter is to be roulid in the volume which has appeared of ei Medical Records and Refearckesf when It is known that the principal contributors are Dr. Haigh-ton, Dr. Babington, and Mr. Ast-ley Cooper. That metallic fubftances have fome influence-on the animal fyffem is fcarcely to be doubted, lince the experiments of Galvani (lee.Monthly Mag-, vol. iii. p. 34.S); Mr. Benjamin Douglas Perkins has publilhed, what he calls, the diicoveries of his father Dr. Perkins of Connedicut, relative to i: The Influence cf Metallic Trafters on the Human Body, £?c.” In the peruial of Mr. Perkins’s pamphlet we cannot but fay, that the numerous liil of difeafes which vaniffled at the magic of thefe tractors in forne mealure reminded us of Dr. Brodum’s panaceas * we were particularly luipiciotis when we found that Mr. Perkin s had taken out. a patent for felling ins' tradors in this kingdom, and that he offers them at five guineas a fet j we were dilpofed, however, to a niore favourable opinion, \vhen he fays concerning them, that lt;c inffead of being luc-cdsfui only among the lower clafles of mankind who are moll lubjed to credulity and inipoiition .they have hitherto been chiefly ufed aui- ag men of lcience and rdpedability, who have ofte* been Ail-