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3. The diagram on the preceding page represents a coal-mining lease in which the position of the centre point at bottom of shaft B is given, also two other points, C and D, in the underground workings. Compute the distance required to be driven on the bearing 79° 25' from D to intersection with eastern boundary at E. Find also the distance E-F. There is a fall from the bottom of shaft B to station C, the angle of inclination being 7° 33' : what is the difference in height betwesn these points, in feet ? 4. The area of a rectangular coal lease is 125 acres and its width 35 chains 25 links : find its length. 5. Describe the mining dial in its simplest form, and how underground observations are made with it. 6. Describe the magnetic needle, its composition, and the best form in which the needle should be made. Give your reasons for preferring one form to another. How and on what are these needles suspended or balanced ? Name one or more stones specially suited for lining the little brass cap above the pivot or centre-pin. 7. Describe how the corners of a coal-mining lease are marked on the surface of the ground, and name what in your opinion are the three most durable woods for survey-pegs. Subject B.— Practical Elementary Electricity. 1. Name the laws governing the flow of electric currents. 2. A machine gives an electric pressure of 60 volts : what current will it send through a resistance of 5 ohms ? 3. A machine has a pressure of 60 volts: what current will be developed by 80-horse power ? 4. Under what conditions would you consider electric power the most suitable for application to work underground in a mine ? 5. In electric shot-firing, what are the points to be carefully attended to by the fireman in order to prevent accidents ? 6. What are the precautions to be carefully observed by those employed in connection with electric-power plants in order that accidents may be avoided ? Subject 9.— Arithmetic, and a Kvnwkdqe of the Coal-mines Act, 1908, and Amendments; aho First Aid to the Injured, 1. If the total pressure upon a separation-door is 400 lb. when the water-gauge is 21 in., what is the area of the opening, and what is the height of the door when its width is 5 ft. 6 in. ? 2. What is the diameter of a pump which will deliver as much water in twelve hours as ;i 10-in.--diameter pump will deliver in eighteen hours, both working the same speed ? 3. A drift or tunnel is 100 yards long, 10 ft. wide at bottom and 9 ft. at top, and 7 ft. 6 in. high : what would be the cost per cubic yard of the tunnel if the price was £4 per lineal yard ? How many tubs of 22 cubic feet capacity would be filled out of the tunnel if the proportion of solid to broken be as 55 to 114 ? 4. If you have an output of 600 tons daily, each tub weighing 5 cwt., and carrying 11 cwt. of coal, what is the total number of tubs and weight raised per shift, exclusive of other weights ? 5. What is the diameter in yards of a circle containing 2-25 acres. First Aid to the Injured. 1. Are you the holder of an ambulance certificate ? State your practical experience in connection with first-aid work. 2. When a person is found in a state of insensibility, what treatment should be applied ? 3. State general rules to be observed in dealing with simple fractures. 4. State the treatment to be practised in cases of burns and scalding, and say what is most to be feared from such injuries. 5. Do you consider ability to render first aid to be an essential qualification for the underground officers Jin^coal-mines|?

QUESTIONS ASKED AT THE 1910 EXAMINATION FOR SECOND-CLASS CERTIFICATES OF COMPETENCY. Subject 1. — Prospecting, Boring, Shaft-sinking, and Opening out a Colliery. 1. State briefly the experience you have had in prospecting for coal, and the general methods of carrying on such work. 2. If required to bore for coal to a depth of several hundred feet, what plant would you prefer to use ? What are the points to be carefully observed in order to secure reliable information from boring ? 3. Give a sketch with figured dimensions of a scaffold suitable to carrying men and material required in the work of walling a shaft 14 ft. clear. 4. Show by sketches what you consider a good arrangement for the bottom of a winding-shaft from which 100 tons of coal per hour has to be raised.