Roasted thin matt, "Gerostete Kupferlieh," Freiberg
before 1889
Thrice roasted regulus, "Spurstein," Hettstedt
before 1889
Copper cemented in charcoal powder
before 1889
Four times roasted regulus, "Spurstein,", "Hettstedt
before 1889
Copper slag, "Schlacke,", Mansfeld
before 1889
Sample of old Muntz metal sheathing, badly corroded. Removed May 1875
before 1889
Result of bad copper being used in brass making
before 1889
Metal-furnace regulus
before 1889
Brass wire which has become brittle by keeping for about one year
before 1889
Zinc containing silver from the skimmings of the zinc alloy
before 1889
Metal-furnace regulus
before 1889
Crystals of magnetic iron
before 1889
Copper wire which was tough, but became brittle
before 1889
Bad brass ships' nails, showing where they have failed
before 1889
Two samples of brass wire
before 1889
Copper containing 0.31% of antimony and 0.20% of lead
before 1889
Wire made from the sheating of H.M.S. "Argonaut"
before 1889
Crystallised product from the smelting furnace
before 1889
Electrotype wire and foil heated in ammonia
before 1889
Ordinary copper wire heated in ammonia
before 1889
Castings of Muntz metal to test copper of boiler tubes
before 1889
Phosphor-bronze
before 1889
Samples of gunmetal broken at high temperatures
before 1889
Microscopic slide of crystalline litharge
before 1889
Sample trade specimen of "crown bronze"
before 1889
Electrotype copper in a thin dense sheet
before 1889
Copper sheathing from H.M.S. "Chatham," marked "V"
before 1889
Copper sheathing from H.M.S. "Falmouth"
before 1889
Copper sheathing from H.M.S. "Nereus"
before 1889
Copper sheathing from H.M.S. "Medway"
before 1889
Copper produced by Bankart's process
before 1889
Bronze, cast round a centre of iron, after the manner of the ancient Assyrians
before 1889
Soft French brass
before 1889
Artificially crystallised sulphide of lead, a furnace product
before 1889
Samples illustrating the process of refining the means of phosphide of copper
before 1889
Concretion from the protoxide furnace, from Messrs. Atkins's Works
before 1889
Electrotype foil, made by Elkington and Co.
before 1889
Sheet of naval brass, as put on the "Anson" at Sheerness
before 1889
Thin sheet of Chinese brass
before 1889
Copper wire
before 1889
Beechwood impregnated with native copper
before 1889
Japanese alloy used for mending native saucepans
before 1889
Sheet of the same copper rolled cold
before 1889
Slab of Japan copper called tile copper
before 1889
General sample of the silver-lead ores from Utah, U.S.A.
before 1889
Powdered galena
before 1889
Copper obtained from stamping native copper ore at Lake Superior
before 1889
Copper obtained from stamping native copper ore
before 1889
Slag from smelting Australian sulphate ores
before 1889
Best ore
before 1889