In the painting of large pictures, in those parts where the corruption of the tint is not of importance, this cheaper form of the oxyd may be used, though, as we have said before, we can see no advantage in such economy, the cost of his pigments, even of the most precious, being but comparatively a trifle, however great the quantity used by the artist.,In grinding whitelead, of whatever sort, especially with oil, and even in mixing it on the palette, there arises an odor that is unpleasant to many persons, and unwholesome to all. It is as well to avoid leaning too closely over the stone or palette, and to throw up the window during either operation.,The oxyds of lead are known to blacken under certain influences; as of sulphuretted-hydrogen gas, which abounds in the noxious effluvia that at times are generated by certain manufactures, by filth or other causes, in the heart of great cities, and even in more open places. Hence chemistry has employed herself in the discovery of other whites which should not be liable to change. From antimony and from zinc, whites have been made which have been said to possess, with sufficient body, and great beauty, assured permanence. Of these we say nothing, having, like M. Bouvier, had no occasion to try them, but we add, that as it will be observed, in every painting that has stood the test of time, that it is not the white that is most discolored, otherwise that as it is the white that has stood best of all the colors, there is no reason for the young artist to have any doubt upon this score, using unhesitatingly the silver white as it is prepared for him by any colorman in good repute. Further than this, whatever may be said of the white of antimony, later and good authorities tell us that that of zinc, as well as those which have been made from bismuth and from tin, want body and consistence.*,* Mr. Field assigns durability to zinc white, but denies it to the preparations of bismuth and antimony, to which he adds quicksilver and arsenic, which are of no worth, either in water or oil. Tin White wants even less body than zinc, though it is "superior to it in water," and It dries badly in oil. Thus lead still holds its ancient place of honor, and with little risk of being ousted.,