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LECTURE 4.1 LECTURE OUTLINE Weekly deadlines The Chalcolithic and Bronze Ages WEEKLY DEADLINES Name History 2: From t he Chalcolit hic, through the Iron Age Lectures Lecture 4.1 The Chalcolit hic and Bronze Age s Lecture 4.2 The Iron Age and Monu mental Buil ding Requi red Book Reading 1 (For the end-of-UNIT qui z) Part B: Prologue + Chap ter 4 (from UNIT 3) Chapters 5, 6, and 7 Animations Mike Fleck: "MetalWork" Biographies Mineral of the Week Assignments Due This Week Assignment 3, A Materials Crossword, is due Wedne sday mi dnight Prac tice Quiz Practice qui z que stions are ava il able on ANGEL, in the Lesson 04 folders. End of Unit Quiz Quiz 4 will cons ist of ~ thirt y (30) que stions for a total of seven ty (70) points. Quizzes are “ind ividua li zed”, bu t wit h the ques tions taken from a large database. Material cove red: Book Reading and Anim ations OUTLINE Natural Resources of Egypt The Melting of Gold The Smelting of Copper The Casting of a Bronze Door The Production of “Egyptian” Faience NATURAL RESOURCES AVAILABLE TO EGYPT Copper from Cyprus Wood from Lebanon Tin from Anatolia Limestone Memphis + + Lapis Lazuli + Turquois e from Afghanis tan +Timna Alabas ter Alabas ter Thebes + + Copper Sands tone Gold Iron + Granite Diorite Other resources Towns + Gold from Nubia Figure 5.2. Sketch map of ancient Egypt showing natural resources. In addition to the Sinaitic copper ores from e.g., Timna, a significant amount of copper was imported from Cyprus. (The Latin name for copper is cuprium; literally, the Cypriot Metal. Hence the chemical symbol: Cu). The masonry for e.g., pyramid building (limestone, sandstone and granite) were all within easy reach of the Nile, as was diorite; a hard volcanic rock, used for hammer stones. Alabaster is a fine-grained gypsum (CaSO 4.2H2O), and was used extensively for carving e.g., amphorae, canopic jars, and statuettes. Sources for the tin would (most likely) include placer deposits in streambeds, and the tin mines in southern Anatolia. TOMB OF REKHMIRE MELTING GOLD IN THE OLD KINGDOM. I MELTING GOLD IN THE OLD KINGDOM. II A GOLDSMITH’S SHOP IN THE NEW KINGDOM. I A GOLDSMITH’S SHOP IN THE NEW KINGDOM. II THE DIFFUSION OF COPPER METALLURGY THROUGHOUT EUROPE AND THE MIDDLE EAST 2500BC 2500BC 3000BC 4000BC 4000BC 5th M illen ium BC Rudna Glava Rio Tinto 3800BC Varna Catal Huyuk 5th M illen ium BC 4th M illen ium BC 3rd M illen ium BC 4th M illen ium BC Timna THE DIFFUSION OF COPPER METALLURGY THROUGHOUT EUROPE AND THE MIDDLE EAST Location Timna (Sinai Peninsula) Catal Huyuk (Anatolia) Rudna Glava (Yugoslavia) Varna (Blac k Sea) Rio Tinto (Spain) Date of Earliest Recorded Copp er Smelting ca. 5000BC ca. 3500BC ca. 4000BC ca. 4500BC ca. 3500BC NATIVE COPPER FROM MICHIGAN’S UPPER PENNINSULA MALACHITE, A GREEN COPPER CARBONATE COPPER SMELTING AT TIMNA IN THE THIRD MILLENNIUM BC. I Foot Bellows Clay Lining Slag-Pit Tuyure Ore + Fuel + Flux Sandstone Blocks SMELTING REACTIONS; COPPER Cu2(CO3)(OH)2 2CuO + CO2+ H2O Cu3(CO3)2(OH)2 3CuO + 2CO2+ H2O CuO + CO Cu + CO2 2Fe2O3 + 2SiO2 2Fe2SiO4 + O2 SMELTING REACTIONS; IRON AND TIN Fe2O3 + 3CO 2Fe + 3CO2 SnO2 + 2CO Sn + 2CO2 COPPER SMELTING AT TIMNA IN THE THIRD MILLENNIUM BC. II Molten Slag Molten Copper THE PROCESSING OF BRONZE AND THE CASTING OF A BRONZE DOOR: I THE PROCESSING OF BRONZE AND THE CASTING OF A BRONZE DOOR: II THE PROCESSING OF BRONZE AND THE CASTING OF A BRONZE DOOR: III THE PROCESSING OF BRONZE AND THE CASTING OF A BRONZE DOOR: IV THE EFFECT OF ADDING TIN TO COPPER THE HARDNESSES OF TIN AND ARSENICAL BRONZES I THE HARDNESSES OF TIN AND ARSENICAL BRONZES II PROCESSING OF “EGYPTIAN FAIENCE” I Lime (CaO) Silica-Quartz (SiO 2) 1-5% Mix and Shape with Water Dry/ Effloresce Fire at ~ 900-1000ÞC Soda (Na2 O) 0.3-5% Figure 5.16. Flow chart for the processing of Egyptian faience. Silica, soda and lime are mixed with water and molded to the final shape and allowed to dry in the sun. The slow drying process concentrates the soda, lime (and impurities such as copper oxides) in the surface layers. When the faience is fired at a temperature in excess of 800ÞC, the sodalime-rich outer skin melts, and subsequently forms a glassy surface, (glaze) during cooling. PROCESSING OF “EGYPTIAN FAIENCE” I a) b) Figure 5.17. Sketch maps of the spread in the production of glazed stoneware from 3000BC (Figure 5.17a) to 2000BC (Figure 5.17b). (Adapted from "Technology in the Ancient World". H. Hodges. Barnes and Noble Books. New York, NY. (1970). I am using the term stoneware rather than faience because Hodges also included e.g., glazed soapstone (talc) in his definition of faience. The soapstone statuettes would be dipped in a faience glaze, or placed in a container containing a faience glaze. “EGYPTIAN FAIENCE”