If phosphoric acid is absent, aluminium, chromium and ferric hydrates are precipitated.
Next to aluminium, tin was found to be the most effective of the metals enumerated above.
His contributions to inorganic chemistry were numerous, including investigations on the compounds of antimony, aluminium, silicon, &c., on the separation of nickel and cobalt, and on the analysis of mineral waters, but they are outweighed in importance by his work on organic substances.
Aluminium, iron, platinum and many other metals may thus take up so much carbon as to become brittle and unforgeable.
Aluminium bronze (aluminium and copper) and ferro-aluminium (aluminium and iron) have been made in this way; the latter is the more satisfactory product, because a certain proportion of carbon is expected in an alloy of this character, as in ferromanganese and cast iron, and its presence is not objectionable.