CHAPTER VIII. IRON ORE, PREPARATION AND SMELTING.--155.

Iron Ore; 156. Magnetite; 157. Red hematite; 158. Limonite or brown hematite; 159. Ferrous carbonate; 160. The Value of Ores; 161. Preparation of Ores; 162. Weathering; 163. Washing; 164. Crushing; 165. Roasting or calcination; 166. Fuels; 167. Fluxes; 168. The Blast; 169. The Reduction or Blast Furnace; 170. Classification of Pig Iron; 171. Bessemer iron; 172. Basic iron; 173. Mill iron; 174. Malleable iron; 175. Charcoal iron; 176. Foundry iron; 177. Grading Iron 161