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2. Explain the principle of a modorn safety-lamp, and how you wouldjleterinine the safe workingconditions of the mine when examining bord-and-pillar workings, with a safety-lamp, for gas. 3. What gases arc given off by gob-fires ? In a mine liable to spontaneous combustion, what special precautions would you adopt ? •A. Ventilate the plan shown in question No. 6 of the firet-class questions on ventilation, using the reference signs thereon to indicate your method. 5. In a hiird, where a heavy fall has occurred, breaking down the brattice, gas has accumulated in the cavity : explain, and show by sketches, how you would clear away the gas and restore the place to working-order. 6. Give your reasons fully why it is necessary to maintain efficient ventilation in mines. 7. How is the volume, of air circulating in mines usually ascertained ? Show by a calculation how vmi would arrive at the Total quantity passing in a mine. Subject 4.— Dealing with Old Workings and other Sources of Danger. 1. What precautions are necessary, and why, where you have extensive areas of old workings in a inine ? 2. What dangers are possible to occur in mines where naked lights aro used ? 3. Enumerate the c uses of creep, and show by sketches the effect of such in working-roads. 4. State the provisions you would make before and after shot-firing in a dry and dusty mine. 5. Accidents occur underground from various causes : what precautions would you adopt to lessen same ? 6. If a district of your mine, in which safety-lamps are used, became suddenly fouled with explosive gas, whai steps would you take ? , Subject s.— Mine Drainage and Haulage, and Appliances for same. 1. Explain the different methods of mine-drainage, and give a description of what you consider the most efficient type of pump. 2. What is the use and advantage of a siphon ; and what are the conditions necessary to enable it to work efficiently ? 3. Describe the different systems of haulage, and state the conditions under which each system may be better applied than the others. 4. How would you lay out and equip a ]ig 5 chains in length and rising lin 8 ? Give your reasons, end illustrate by sketches. 5. Describe the various appliances in vte for atiachiog tnl g to haulage-Topee. Subject 6. — Practical Elementary Electricity. 1. Describe the application of electricity to underground signalling. 2. Describe as fully as you can a battery as used for shot-firing by electricity. 3. Name the principal parts of a dynamo, and their purpose. 4. What sources of danger can arise from the application of electricity underground ? 5. What causes may operate to throw an electric signalling system out of working-order ? Subjkct 7.— Arithmetic, <tml a Knowledge of the Coal-mines Act, 1908, and its AmendmetUg; aleo', First Aid to the Injured. 1. Add together £523 11s. lOfd., £260 4s. llfd., £23 4s. 3Jd. ; 15s. 9sd., subtract £47 16s. ll£d.. and divide the remainder by 19. 2. A miner earns 15s. lljd. per shift for three pays of H days each : what are the total earnings, and how much would he receive for a similar period with an increase of 5 per cent. ? 3. How many chains of single road will 10 tons of 9 ft. rails, 16 lb. per yard, lay ? 4. A shaft-sump, 14 ft. diameter and 20 ft. deep, is full of water : how many gallons are thero ? 5. How many bricks would be required for a dam 8 ft. wide, 6 ft. high, and 4 ft. thick ? 6. Briefly state the requirements of the Coal-mines Act, and amendments thereto, as to, (o.) Special rules; (6.) Vertical shafts to underground furnaces ; (c.) Water and boreholes ; (d.) Ropes and chains. First Aid. 1. How would you render first aid to a workman whose foot and leg were badly crushed by a fall of coal ? 2. Name the different kinds of fracture, and how you would treat them. 3. What treatment would you give a person overcome by black damp ? 4. Heavy bleeding oftentimes results from accidents : state some of the forms of such, and how you would treat them.

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