JUNE 20.] THE NEW ZEALAND GAZETTE. 1877

(g.) He must explain the construction of boilers and machinery used in simple, compound, triple, and quadruple engines, how the steam does its work in the engines, and the action of the slide and link motion and single eccentric.

Restricted limits.

43. A third-class engineer’s certificate will entitle the holder to be engineer of any steamer authorised to ply within restricted limits only, and having condensing or high-pressure engines.

Qualification of candidate for second-class engineer’s certificate.

44. Second-class Engineer.—A candidate for a second-class engineer’s certificate must be twenty-one years of age.

(a.) He must have served one year at sea as engineer on regular watch on the main engines or boilers of a foreign-going or intercolonial steamship of not less than 66 nominal horse-power, or eighteen months in a home-trade steamship of not less than 66 nominal horse-power, whilst possessed of or entitled to a third-class engineer’s certificate, or a Minister’s certificate of exemption from the third-class examination.

(b.) He must be able to give a satisfactory description of boilers, and the methods of staying them, together with the use and management of the different valves, cocks, pipes, and connections.

(c.) He must understand how to correct defects from accident, decay, &c., and the means of repairing such defects.

(d.) He must understand the use of the water-gauge, pressure-gauge, barometer, thermometer, and salinometer, and the principles on which they are constructed.

(e.) He must state the causes, effects, and usual remedies for incrustation and corrosion.

(f.) He must be able to explain the method of testing and altering the setting of the slide-valves, and method of testing the fairness of shafts, and adjusting them.

(g.) He must be able to calculate the suitable working-pressure for a steam boiler of given dimensions, and the stress per square inch on crank and tunnel shafts when the necessary data are furnished.

(h.) He must understand the construction of steering-engines, evaporators, feed-filters, and feed-heaters.

(i.) He must understand the construction of centrifugal, bucket, and plunger pumps, and the principles on which they act.

(j.) He must be able to state how a temporary or permanent repair could be effected in case of derangement of a part of the machinery or a total breakdown.

(k.) He must write a legible hand, and have a good knowledge of arithmetic up to and including vulgar and decimal fractions and square and cube root; he must also understand the application of these rules to questions about safety-valves, consumption of stores, capacities of tanks, bunkers, &c.

(l.) He must be able to pass a creditable examination as to the various constructions of paddle and screw engines in general use, as to the details of the different working-parts, external and internal, and the use of each part.

(m.) He must possess a creditable knowledge of the prominent facts relating to combustion, heat, and steam.

Qualification of candidate for first-class engineer’s certificate

45. First-class Engineer.—A candidate for a first-class engineer’s certificate must be not less than twenty-two years of age.

46. In addition to the qualification required for a second-class engineer,—

(a.) He must have served at sea for twelve months with a second-class certificate of competency or service as senior engineer in charge of a watch on the main engines or boilers of a foreign-going steamship of not less than 99 nominal horse-power; or have served at sea for eighteen months with a second-class certificate of competency or service as first engineer of a home-trade steamer of not less than 99 nominal horse-power; or two years with a second-class certificate of competency or service as second engineer of a home-trade steamer of not less than 99 nominal horse-power; or two and a half years with a second-class certificate of competency or service as third engineer of a home-trade steamer of not less than 99 nominal horse-power, if during the whole of that period he has been the senior engineer in charge of a watch on the main engines and boilers; or possess or be entitled to a first-class certificate of service.

(b.) He will be required to make an intelligible hand-sketch, or a working-drawing of some one or more of the principal parts of a steam-engine; and to mark in, without a copy, all the necessary dimensions in figures, so that the sketch or drawing could be worked from.

(c.) He must also be able to take off and calculate indicator diagrams.

(d.) He must be able to calculate safety-valve pressures, and the strength of the boiler shell, stays, and riveting.

(e.) He must be able to state the general proportions borne by the principal parts of the machinery to each other, and to calculate the direct stress, the torsional stress, and the bending stress in round bars, and the direct stress and the bending stress in rectangular bars, with given loads.

(f.) He must be able to explain the method of testing and altering the setting of the slide-valves, and to sketch about what difference any alteration in the slide-valve will make in the indicator diagram, and also the method of testing the fairness of shafts, and of adjusting them.

(g.) He must be conversant with surface condensation, superheating, and the working of steam expansively.

(h.) His knowledge of arithmetic must include the mensuration of superficies and solids and the extraction of the square and cube roots, and the application of these rules to questions relating to the power, duty,