(b) Dovetail.

4. Explain and illustrate by sketches the following terms used

in carpentry

(a) Scarf.

(c) Tusk Tenon.

(d) Hooklap.

(e) Notching and cogging.

(f) Housing.

5. Sketch and describe the roof framing for a space

sketch without internal supports.

7. Sketch and describe the covering of the roof in question 5, with slates, the plumbing required thereto, and the guttering and rain water pipes.

8. Write a specification for

(a) Painting the wordwork and plastering of a room.
(b) Glazing an ordinary house with a shop attached.

as per

DEPARTMENT OF MINING AND METALLURGY.

SECOND YEAR EXAMINATION.

PHYSICS.

1. Define the term "capacity" of an electrical condenser. The area of one of the tin foil surfaces of a Leyden Jar is 1000 sq. cm., the thickness of the glass is 3 mm., and its specific inductive capacity is 6. Find the capacity in micro-farads. A Farad equals 10- C.G.S. units (electromagnetic system), and the electrostatic unit of capacity in terms of the electro-magnetic is 1/2

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2. Describe fully how you would experimentally compare Potential Differences.

3. Explain under what circumstances currents are proportional to the tangents of the angles of deflection of a magnetic needle. Describe fully how the constant of a Tangent Galvanometer may be determined.

4. State and explain the elements which are necessary to completely describe the earth's magnetic field at any point of the earth's surface. Describe an elementary

method of finding the Horizontal Intensity.

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5. Explain the meaning of the terms "magnetic force," magnetic intensity," and "magnetic induction." Find the relation which exists between these quantities. Describe how the relation between the magnetic force and the magnetic intensity, or between the magnetic force and the magnetic induction, for a specimen of iron, may be experimentally determined.

6. Explain for what sort of measurements the ballistic galvanometer is used. Describe some method by which the galvanometer may be calibrated, giving full theoretical detail.

7. Explain fully why an iron core is used in the primary coil of an induction coil, and why it is made of iron wires instead of being solid.

MATHEMATICS, CHEMISTRY AND GEOLOGY.

The same papers as those set in the Second Year of Science.

MINERALOGY.

1. What is the chemical composition, chief characteristics, and mode of origin of the following:-Alunite, Bauxite, Amber, Ouvarovite (Uvarovite), Turquois, Dyscrasite ? 2. What are the following minerals, and with what other minerals or rocks are they associated :-Marshite, Kalgoorlite, Rhodonite, Spartalite (Zincite), Selwynite, Tasmanite ?

3. Describe briefly the principal ores of Zinc.

4. Write a short account of the chief silicates in which soda is an important constituent.

5. Describe the mineral asphaltum, and explain its mode of occurrence. In what geological formations in Australia is it possible that asphaltum may be found?

6. How would you distinguish the following from one anotherSpinel from Ruby, Pyrope Garnet, red Zircon, ruby Tinstone, Rutile and Cuprite; Tourmaline from Chromite, Hornblende, Magnetite, Pleonaste, and and Manganite; Noumeaite from Malachite, Chlorite, Pyromorphite, Olivenite and Scorodite?

7. Describe the arsenides and sulphides of each of the following:-Nickel, Cobalt, Copper, Antimony. What evidence is there as to the possible existence in certain minerals of sulphides or arsenides of gold?

PRACTICAL MINERALOGY-Three hours.

MINING I.

1. Define, and give a brief account of the following:—(a) High explosive; (b) Vadose circulation; (c) Under-reamer; (d) Walking-beam; (e) Gossan; (f) Stratum of invariable temperature; (g) Tributers; (h) Helicoidal-wire system of quarrying; (i) Bell shafts; (j) Cleat.

2. Describe the mining district of Cornwall, with special reference to (a) its geology, (b) the character and mode of occurrence of its ore-deposits. Mention any district in Australia where, in your opinion, the geological and mineralogical conditions are somewhat similar; give details of the resemblance.

3. Describe the various operations (other than boring) in use for prospecting for metalliferous deposits of different kinds. 4. Draw (approximately to scale) a plan, longitudinal section, and cross section, showing the workings to a depth of 600 feet in a metalliferous lode; name the various excavations in each case.

5. Describe Mather and Platt's method of boring, and illustrate your description by sketches.

MINING II.

1. State what you know about dry rot in mines, and mention any methods that have been tried for arresting or preventing its action. Under what conditions are mines generally free from dry rot?

2. Describe the Schiele Fan, and discuss the merits of fans and furnaces respectively for ventilating collieries.

3. Give a detailed description of the endless rope method of haulage, illustrating your description by sketches.

4. What are the principles of the modern methods for the reduction and concentration of ores? Describe the various steps in the preparation of concentrates from an ore consisting of quartz with 15 per cent. of mixed sulphides, such as argentiferous galena, gray copper ore, and auriferous mispickel.

5. Describe the construction and operation of a modern stamper battery, and illustrate by sketches.

METALLURGY I.

1. Give the composition of fire-clay, and enumerate the impurities which diminish the refractory qualities of such clays. What investigations would you carry out with a view to determining the refractory nature of a clay?

2. Upon what principle do coal washing machines depend? Give a general description of a Lührig coal washing plant.

3. What are the type characteristics of

(a) Shaft furnace,

(b) Reverberatory furnace,

(c) Muffle furnace?

Describe a characteristic process carried out in each type of furnace.

4. Describe heap roasting, and compare this form of roasting with furnace roasting of sulphide ores.

5. Describe a modern cyanide plant for the treatment of tailings direct from the battery plant, and the general method of working.

6. Describe any wet method for the extraction of silver from its ores, and state under what conditions you would adopt a wet process of extraction.

METALLURGY II.

1. In smelting in a blast furnace an argentiferous lead ore which has undergone a sintering roast, and which contains sulphur, arsenic, zinc, iron and quartz, and is acidic in character, how is the removal of these substances effected, and of what approximate composition are the products? 2. Discuss as fully as possible the theory and practice of Bessemerizing Copper matte.

3. Describe the process of Nickel smelting resulting in the production of a Copper-Nickel matte from a sulphide ore consisting mainly of magnetic pyrites, with 3 per cent. of Copper and 3 per cent. of Nickel. State reasons why it is impossible to convert a Copper-Nickel-Iron matte into a Copper-Nickel alloy.

4. Give general dimensions, with sketch, of a modern blast furnace for the manufacture of pig iron, and trace the changes which occur in the descending charge of fuel, ore and flux, and in the ascending current of gases in such a furnace.