Ordronaux says (sec. 186): It cannot be denied that had Mrs. Thomas died, Foord would, equally with Gilbert, have been guilty of manslaughter, since whether he intended it or no, he was doing an unlawful act in dispensing a poison for a salutary medicine. While then it may be proper enough to rely upon labels and warranties of others, |182| in dealing with ordinary substances, still when it comes to articles of a character dangerous to health or life, the law will presume knowledge of their quality in those professionally dealing in them, and exact a degree of skill and care commensurate with the risks incurred. Here it is _caveat venditor_ instead of _caveat emptor_. In Kentucky, a druggist sold croton oil instead of linseed oil for a patient, who, in consequence of the mistake, died. His widow was held entitled to full damages against the seller [476]. If a druggist negligently sell a deadly poison as and for a harmless medicine to A., who buys it to administer to B., and gives B. a dose of it as a medicine, from the effect of which he dies, a right of action against the druggist survives to B.’s representative, notwithstanding the want of privity of contract between B. and the druggist [477]. And this is the rule, also, when the sale has been made by the apothecary’s assistant [478]. Joseph George, and Emma, his wife, sued Skivington, a druggist, alleging that he, in the course of his business, professed to sell a chemical compound made of ingredients known only to him, and by him represented to be fit for a hairwash without causing injury to the person that used it, and to have been carefully compounded by him; that Joseph thereupon bought of the defendant a bottle of this hairwash, to be used by Emma, as the defendant knew, and on the terms that it could be so safely used, and had been so compounded; yet the defendant had so negligently and unskilfully conducted himself in preparing and selling the hairwash, that it was unfit to be used for washing the hair, whereby the plaintiff, Emma, who used it for that |183| purpose was injured. The Court held that a good cause of action was shewn [479].