PALLADIUM is of a dull-white colour, malleable and ductile. Its specific gravity is about 11.3, or 11-86 when laminated. It fuses at a temperature above that required for the fusion of gold. (Brande, 998.)
"Palladium is a soft metal, but its alloys are all harder than the pure metal With silver it forms a very tough malleable alloy, fit for the graduations of mathematical instruments, and for dental surgery, for which it is much used by the French; with silver and copper, palladium makes a very springy alloy, used for the points of pencil-cases, inoculating lancets, tooth-picks, or any purpose where elasticity and the property of not tarnishing are required; thus alloyed it takes a high polish. Pure palladium is not fusible at ordinary temperatures, but at a high temperature it agglutinates so as to be afterwards malleable and ductile." - W. Cock.
This useful metal was discovered by Dr. Wollaston in 1803, and it has recently been found in some abundance in the gold ores of the Minas Geraes direict; the process now employed for its separation was discovered by from its low specific gravity, it may be obtained at about half the price of an equal bulk of platinum, and at one-eighth that of gold; and it equally resists the action of mineral acids and sulphuretted hydrogen. - London Journal of Science for 1840.
Mr. P.N. Johnson. Palladium is calculated thoroughly to fulfil many of the purposes to which platinum and gold are applied in the useful arts, and
Palladium was used in the construction of the balances for the United States' mint. See also Mallett's palladiumizing process, page 302.