American Sand & Gravel Co. v. Reeves

All authorities agree that the master is charged with knowledge of the usual and ordinary dangers and hazards to which he is exposing his employee, and is bound to know the nature of the constituents and general characteristics of the substances used in and about his business or in that part thereof wherein an injury may occur or has occurred; and this rule is applied without serious question in cases of the use of dangerous chemicals. 39 C. J., pp. 491, 510; 18 R. C. L., p. 571; 1 Labatt, 298-301; Adams v. Grand Rapids Refrigerator Co., 160 Mich. 590, 125 N. W. 724, 27 L. R. A. (N. S.) 953,…