: ON THE SEMI-NEUTRAL, BROWN.
are produced by various methods of several hues, tints, and shades, both
by wet and dry processes. We have obtained them by many methods, of
different degrees of permanence. Some very intense in colour have stood
well, while others paler and more delicate have gradually greened, but
none possessed the strict stability of the green oxides. Presuming a
paucity of browns, these preparations of chromium would be worth further
attention; but, with the objection of being--for browns--somewhat
expensive, they have the far more fatal objection of not being wanted.