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Unformatted text preview: 1 1 Guns and Sails 2 Modernity Key late medieval innovations : the mechanical clock cast iron gunpowder & firearms the compass the caravel 3 Materials Key materials of traditional society Wood Ceramics Stone Fibers Leather Metals 4 Advantages of wood is easily cut and worked can be shaped in other ways (bent, turned, drilled, planed) is strong in compression (stronger than many metals, by weight) is common, easily gathered & prepared for use 5 Disadvantages of wood does not hold an edge is weak in tension can often be easily penetrated wears easily is easily destroyed by fire and water cannot be cast or molded 6 The Metals Copper & copper alloys (brass & bronze) Precious metals (gold & silver) Base metals (lead, tin) Iron--the most important 7 Basic types of iron: >> Wrought iron <0.1% carbon (almost pure iron, some slag) ductile, tough, the classic form of all iron >> Steel between 0.2% C &1.5% C 2...
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- Fall '08