Calendar: 1884-1885 Page 676

670 APPLIED SCIENCES XIII -iHctallurgg What properties should Coal possess in order that it may be successfully used in blast-furnace without having been previously coked Explain the advantages of working with hot blast State the temperatures now usually employed in iron-smelting with iron-pipe stoves with fire-brick stoves What are the conditions which in practice limit the temperature obtainable by stoves Describe the kind of coal best suited for making strong oven-coke By what means is the extremely high temperature necessary to keep the decarburised iron fluid obtained in the Siemens process in the acid" Bessemer process in the ubasic" Bessemer or Thomas-Gilchrist process Why is it that metal suited for ship and boiler plates can be more readily and economically produced by the basic than by the acid Bessemer process State briefly the principles involved in the reduction of copper lead tin and zinc from their ores What is it that determines the extent to which metal is malleable and ductile Supposing in working the acid Bessemer process you have to use very high grade pig-iron would it be desirable to obtain the highest temperature possible If not say why and give two ways of reducing the temperature Name the specimens placed upon the table stating in each case the characteristics by which you recognize them XIV -Cije OTorfe op THIRD YEAR Sketch section of the back gear spindle of our newest lathe showing the eccentric action for throwing in and out of srear