Mar. 27.] THE NEW ZEALAND GAZETTE. 873

difference between 30 in. and 27·1 in. is 2·9 in. This result multiplied by 1·6 is 4·64, which has to be added to 72, making 76·64. The nearest whole number to this is 77 degrees, which is to be taken as the corrected flashing-point, and if the testing had been commenced at or below 64 degrees, the true flashing-point is 77 degrees.

Again: Suppose the observed flashing-point of an oil to be 96 degrees, and the testing had been commenced at 87 degrees and the barometer indicated 30·6 in., the true flashing-point of the oil is the nearest whole number to 96 minus the product of 0·6 multiplied by 1·6—that is, 95 degrees.

The readings of the barometer are to be corrected readings, in accordance with the corrections applicable to the instrument in use. The instrument must be compared periodically with the standard barometer at the office of the Chief Inspector, and regulated thereby.

VI.—APPLICATION OF THE TEST TO VISCOUS FLUIDS OR PREPARATIONS.

If the flashing-test has to be applied to substances of a viscous or semi-solid nature which cannot be poured (such as solutions of indiarubber in mineral naphtha), the mode of proceeding is as follows:—

One fluid ounce or two tablespoonfuls of the substance to be tested is placed in the cup, and the cover is put on. The air-chamber in the water bath is filled with water to a depth of 1½ in., and the temperature of the water bath is raised to 90 degrees. The cup is then put into the bath, and the temperature of the water bath maintained at 90 degrees throughout the test. After the lapse of fifteen minutes the test-flame is to be applied. If no flash occurs the heating is continued for another fifteen minutes and the test-flame again applied, and so on until a flash takes place, or the temperature in the cup has reached 90 degrees, and so on.

The temperature at which a flash occurs is the observed flashing-point of the substance, and, subject to correction for atmospheric pressure, as hereinbefore described, is the true flashing-point.

SIXTH SCHEDULE.

INSTRUCTIONS ON THE USE OF THE SAFETY-LAMP.

1. Before any tank which is not already known to be free from dangerous gas is entered a preliminary test of the atmosphere must be made with a locked safety-lamp.

2. Persons using safety-lamps should be carefully instructed as to the use of these lamps in tanks and confined spaces.

3. To test for small quantities of inflammable gas with a miner’s safety-lamp the flame must be carefully turned down until all the white light has disappeared and only a small blue flame is left. The presence of inflammable gas in the air is indicated by a pale triangular flame or “cap” which appears over the top of the blue flame, varying in size and intensity according to the amount of inflammable gas present. The lamp should be held close to the observer’s eye in making this examination.

4. It is important to note that petroleum gas is considerably heavier than air and may therefore remain in the lower part of the tank whether closed at the top or not.

5. In order to make a test, after the flame of the safety-lamp has been turned down a careful and detailed examination should be made in both the upper and lower part of the tank. The lamp must be tried as far inside the tank as it can be held without losing sight of the flame and should be lowered by a line if necessary to reach the bottom of the tank, for the purpose of making a preliminary examination. As soon as the lamp will burn steadily in these positions the tank may be entered for the purpose of making a further examination.

6. If a cap, however faint, is visible on the lowered flame or the safety-lamp be extinguished either by explosive or non-explosive gas, or burns dimly, no person should be allowed to work in the tank until it has been thoroughly ventilated and the gas removed.

7. Should any indication of dangerous gas be observed the space is to be further ventilated until no indication of the presence of gas can be detected. The person making a test should keep in communication with those outside the tank.

8. To prevent unauthorized interference with the safety-lamps, the person in charge is to make arrangements for trimming the lamps before they are issued, and for the keys to be retained by some responsible person.

F. D. THOMSON,
Clerk of the Executive Council.

(I.A. 13/134/11.)

Regulations under the Explosive and Dangerous Goods Amendment Act, 1920, to take effect as By-laws within certain specified Boroughs.

CHARLES FERGUSSON, Governor-General.

ORDER IN COUNCIL.

At the Government Buildings at Wellington, this 24th day of March, 1928.

Present:

THE RIGHT HONOURABLE J. G. COATES, P.C., PRESIDING IN COUNCIL.

WHEREAS the Minister of Internal Affairs, in pursuance of the powers conferred on him by section fifteen of the Explosive and Dangerous Goods Amendment Act, 1920, did by several requisitions each dated the twentieth day of June, one thousand nine hundred and twenty-seven, require the several Borough Councils mentioned in the First Schedule hereto, being licensing authorities under the said Act, to alter their respective by-laws made pursuant to the said Act:

And whereas the said Borough Councils did not within three months from the respective receipt of the said requisitions alter their said respective by-laws in the manner required by the said requisitions:

Now, therefore, His Excellency the Governor-General of the Dominion of New Zealand, acting by and with the advice and consent of the Executive Council of the said Dominion, and in pursuance and exercise of the powers conferred on him by section fifteen aforesaid, doth hereby made the regulations set forth in the Second Schedule hereto, to give effect to the said respective requisitions.

FIRST SCHEDULE.

BOROUGH COUNCILS.

Alexandra. Opotiki.
Arrowtown. Otahuhu.
Ashburton. Otaki.
Balclutha. Paeroa.
Blenheim. Pahiatua.
Bluff. Palmerston North.
Brunner. Palmerston, Otago.]
Cambridge Patea.
Carterton. Petone.
Cromwell. Picton.
Dannevirke. Port Chalmers.
Dargaville Pukekohe.
Eastbourne. Queenstown.
Ekatahuna. Raetihi.
Eltham. Rangiora.
Featherston. Riccarton.
Feilding. Riverton.
Foxton. Richmond.
Geraldine. Ross.
Gisborne. Rotorua.
Gore. Roxburgh.
Green Island. Runanga.
Greymouth. Shannon.
Greytown. St. Kilda.
Hamilton. Stratford.
Hastings. Sumner.
Hawera. Taihape.
Hokitika. Tapanui.
Inglewood. Taumarunui.
Invercargill. Tauranga.
Kaiapoi. Te Aroha.
Kaitangata. Te Awamutu.
Lawrence. Te Kuiti.
Levin. Temuka.
Lyttelton. Thames.
Marton. Timaru.
Masterton. Upper Hutt.
Mataura. Waihi.
Milton. Waikouaiti.
Morrinsville. Waimate.
Mosgiel. Waipawa.
Motueka. Waipukurau.
Naseby. Wairoa.
Nelson (City of). Waitara.
New Brighton. Wanganui (City of).
New Plymouth. Westport.
Ngaruawahia. Whakatane.
Northcote. Whangarei.
Oamaru. Woodville.
Ohakune.