on linseed oil should be much less than that of litharge, when used with it in paint. Experience has shown this to be a fact, and has also demonstrated that a high grade of red lead is a valuable pigment.

Such a grade of red lead, when properly mixed for use, and applied to a smooth, vertical surface, should neither run, separate, nor sag. Red lead should be used as a plaster upon steel, not as a paint. We know of no first coating equal to it, for it forms a tough, adhesive, and unyielding cement, that not only dries well, but does not retard the drying of any paint spread over it. It is claimed that the fact that red lead sometimes hastens the drying of any paint spread over it is a reason for its condemnation. It is true that if the red-lead coat is not dry when it is painted over, it will quickly oxidize or burn  up the   paint  or