7. What are the products of combustion of blasting powder and No. 1 Nobel's dynamite respectively? State to what causes incomplete combustion may be attributed; what are the products of incomplete combustion of the two explosives named; and what remedies you would employ to counteract the effects of incomplete combustion in confined working places.

8. Prepare a diagram section of a stamp mill, extending from the feed hopper to the waste launder, giving full particulars as to gradients of copper plates and blanket strakes.

NOTE.-All answers must be illustrated by diagrams, not necessarily to scale, but drawn with sufficient accuracy to serve the purpose of working drawings.

METALLURGY.

The Board of Examiners in Chemistry.

Write papers on the following subjects:-
(a) Electrolysis as a metallurgical agent.

(b) Gaseous fuel and its applications in metallurgy.

(c) The assay of silver ores.

(d) The roasting of sulphide ores.

FINAL HONOUR EXAMINATION FOR THE DEGREE OF B.C.E.

HYDRAULIC AND SANITARY ENGINEERING (INCLUDING IRRIGATION).

FIRST PAPEr.

Mr. B. A. Smith.

Give the necessary calculations, and supply neat sketches for working drawings of one of the following works:

(a) A mixed flow vertical turbine to develop 100 H.P., with a fall of 20 feet, running at 150 revolutions per minute, and having an efficiency of 80 per cent. when the turbine is delivering into air at tailwater level.

Also design a suitable governor for this turbine.

or (b) An arched concrete weir to raise the waterlevei 80 feet at the site shown on the accompanying drawings. The maximum stress in the concrete is to be 15 tons per square foot.

Show clearly the provision you would make for dealing with the water in the river during construction, the ordinary flow amounting to about 1,500 cubic feet per minute. During high floods the discharge may rise to 300,000 cubic feet per second.

HYDRAULIC AND SANITARY ENGINEERING (INCLUDING IRRIGATION).

SECOND PAPER.

Mr. B. A. Smith.

Design a water meter to regulate the discharge so as to deliver specified quantities of water up to 200 cubic feet per minute into an offtake channel at right angles to the main irrigation channel. The loss of head must not exceed 3 inches when the water level in the main channel is at its minimum. A variation of water level of 2 feet in the main channel is to be provided for.

HYDRAULIC AND SANITARY ENGINEERING (INCLUDING IRRIGATION).

THIRD PAPER.

Mr. B. A. Smith.

You are required to dispose of one million gallons of sewage per day all the year round on a sewage farm, in a locality where the annual rainfall is about 15 inches; 10 inches falling from April to September inclusive, and 5 inches from October to February. The soil is light sandy loam to a depth of 5 feet, then clay; the surface has a fall of about 2 feet per mile towards a watercourse whose bed is about 10 feet below the surface.

Give drawings and descriptions of the apparatus you would use in the treatment of the sewage, and describe clearly how you would deal with it on the land, shewing what areas (if any) you would use for filter-beds and what areas you would set apart for the farm. Also indicate how you would treat the sewage before using it for irrigating such crops as lucerne.

EXAMINATION FOR THE DEGREE OF M.C.E.

SURVEYING AND LEVELLING.

FIRST PAPER.

Mr. Fowler.

1. In latitude 38° 22′ S. and longitude 9 hrs. 39 min. 4 sec. E., on 8th February, 1896, the observed double altitude of the sun's lower limb was found to be 88° 4′ 50′′, when a chronometer set approximately to standard time indicated 9 hrs. 35 min. 54 sec. a.m.

The index correction of the sextant was—1′ 0′′.
What was the error of the chronometer ?

The following information is extracted from the Nautical Almanac, and is for Greenwich mean noon of 7th February :

Sun's declination 15° 21′ 56′′-7 S.
Variation per hour (decreasing), 46" 8.
Equation of time (apparent to mean time),
+ 14 min. 20·32 sec.

Variation per hour (increasing), 0.135 sec.
Sun's semi-diameter, 16′ 14′′.

2. The following observations were taken for the purpose of determining the altitude of Mount Baw-Baw, the readings being corrected for instrument errors. Compute its height

sea level:

Instrument.

above

The correction to aneroid readings at Moe on 30.12.95, for corresponding readings on 1.1.96, as determined by Barograph is — 0" 14, and the similar correction to the readings of 4.1.96 for corresponding readings of 1.1.96 is + 0".01. The deduced reading of boiling point thermometer at Moe on 1.1.96 is 2110.56, the height of the Moe station 237 feet above sea level, and the temperatures on 1.1.96 at Moe 70°; on Baw-Baw 66°. The approximate latitude is 38° S.