clude moisture and gases from the metal

covered with it, that is, prevent its corr-

osion.

How best to secure these essential features, is a problem which has puzzled the heads and vexed the hearts of painters, chemists, and engineers for years, and it will probably continue to do so for years to come or until some means are devised under which it will be possible to determine quickly what coatings satisfy the requirements of service and use. As manufacturers of both oil and varnish paints, our faith is, at the present writing, established in oil paints, because years of study, observation, and experience have demonstrated their superiority for steel, if well made, to coatings of any other kind.

Varnish paints are more sensitive to changes of temperature than oil paints and