13672904 - Schifferstadt gold hat14078897 - Golden helmet of a Celtic warrior13672930 - Bronze shield from Gwynedd, Wales.13672923 - Bronze shield from Gwynedd, Wales.13472838 - Aluminite13244622 - Crystals of a mixture of salts, polarised light micrograph14078893 - Tubular axes, from the sites The Brull and La Plana de Vic13357522 - Colorful Flame from Smelting Copper and Tin13673002 - Schifferstadt gold hat13244620 - Crystals of a mixture of salts, polarised light micrograph13756094 - Blast furnace13368045 - Sulphate chemicals, polarised light micrograph13244619 - Crystals of a mixture of salts, polarised light micrograph13242918 - Native gold13243525 - Alloy precipitate, STEM13244621 - Crystals of a mixture of salts, polarised light micrograph12915330 - Die-stamping the channel and eye position on needle wires12914865 - Casting cannon, 1751-178013732894 - Puddling furnace, 19th century illustration13426482 - Aluminium manufacturing, 19th century illustration13244618 - Crystals of a mixture of salts, polarised light micrograph13243526 - Alloy precipitate, STEM13426483 - Aluminium alloy workshop, 19th century illustration13243524 - Alloy precipitate, STEM12914787 - Phoenix Iron and Bridge Works, Pennsylvania, USA, 187312901106 - Forging the Anchor', 20th century13472856 - Native copper12915287 - Forge with bellows driven by an undershot water wheel12903796 - Henri Etienne St Claire Deville, 19th century French chemist12903317 - Georgius Agricola, German physician and metallurgist14078903 - Turned Armilla13472833 - Nickeline13368046 - Ammonium nickel sulphate, polarised light micrograph12916418 - Separating lead from silver or gold in a cupellation furnace12916166 - Miner's hammers of various sizes, 155612903972 - Iron foundry, 180212901494 - Section of a Blast Furnace, Showing its Food', c188012901152 - Bell and cannon caster, 16th century13368048 - Metal sulphate and cobalt chloride, light micrograph12916071 - Needle making workshop, 1751-178012914788 - General view of Pittsburgh, Pennsylvania, USA, 183312900939 - Coppersmith, 16th century12916420 - Smelting of ores (gold, silver, copper and lead), 155612915286 - Forge with bellows driven by an undershot water wheel12903004 - Forging a magnet, 160013688846 - Flowing liquid iron13472837 - Aluminite12991952 - A Goldsmith in his Shop, 15th century12916074 - Industrial laboratory12915323 - Needle-making, 1751-178012903501 - Carglaze tin mine, near St Austell, Cornwall, England, c182513368047 - Ammonium nickel sulphate, polarised light micrograph12915654 - Stamping and roasting ore to extract metal, 155612903719 - Washing ore to extract gold, 168312903435 - Preparation of copper and silver, 168312915638 - Pen factory, St Paul's Square, Birmingham, England12915261 - Rolling mill and forge powered by hot gases from a furnace12654325 - Georgius Agricola, De Re Metallica, Triangulation13502226 - Georgius Agricola, Father of mineralogy12945136 - Metal industry montage, illustration12915256 - Smelting iron and hammering bars with a mechanical hammer12914791 - Phoenix Iron and Bridge Works, Pennsylvania, 187312914531 - Wire Worker, 16th century12504075 - Copper plating factory12504027 - Electroless nickel plating factory12901717 - The Bessemer process for the mass-production of steel, c188012582041 - Gladiator sword from Pompeii12504055 - Copper plating factory12504031 - Shotgun pellets ready for electroless nickel plating12915393 - The foundry or cast house, Butterley Ironworks, Derbyshire12914792 - Phoenix Iron and Bridge Works, Pennsylvania, 187312914790 - Phoenix Iron and Bridge Works, Pennsylvania, 187312504083 - Drying after electroless nickel plating12504048 - Components ready for electroless nickel plating12504045 - Quality control at electroless nickel plating factory12504037 - Quality control at electroless nickel plating factory14084301 - Lathe, illustration13499678 - Gripping beast brooch13403419 - Chemical mixture, polarised light micrograph12915698 - Forging a magnet, 160012915457 - Blast furnaces, Phoenixville, Pennsylvania, USA12915041 - Georgius Agricola, German physician and metallurgist12902358 - Shoe Lane, London, c180612899417 - Forge being worked at Edgar Allen's foundry, 196212655710 - Charles Siemens12584049 - High-voltage generator being grounded12584048 - Researcher using a microscope, 20th century12504017 - Electroless nickel plating factory13368049 - Metal sulphate and cobalt chloride, light micrograph12970568 - Egyptian tomb scene, illustration12916171 - Refining copper using the 'Hungarian' process, 168312915392 - Casting the bell for the Westminster Clock Tower, 185612900932 - Spur maker, 16th century12899457 - Village Blacksmiths, 188312504085 - Components ready for electroless nickel plating12504014 - Electroless nickel plating factory13498953 - Brinell tester12944686 - Molten metal pouring into euro sign mold, illustration12944685 - Molten metal pouring into dollar sign mold, illustrationpage suivante