Calendar: 1880-1881 Page 680

680 APPLIED SCIENCES experiments of Messrs Thomas and Gilchrist have on this subject At what stage of the Cornish tin smelting process are billets of green wood depressed under the metal and with what object Explain the general construction and advantages of Siemens' regenerative gas furnace Give the names of the six typical specimens exhibited on the table and mention the principal characteristics of each XII -TOorfe op THIRD YEAR Give the numbers of change wheels to cut screw on inch gas barrel 11 threads to the inch leading screw to the inch Sketch from memory the tool holder of the Whitworth slotting machine showing details of construction What is the object of mixing coal dust with moulding sand for iron founding Describe the process of venting and its object in plain sand mould How do you judge of the heat in making and tempering chipping chisel How do you distinguish between welding and burning heat in iron SECOND YEAR In soft wood turning upon what guiding points do you depend to avoid catching in cylindrical or spherical work and how is the gouge guided in turning out and finishing the hollow of cup What parts of chipping chisel do you look to for fairness of work Point out the properties of good chipping hammer and its handle