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93
On 7th July, 1896, the Surveyor reported as follows in reference to the lamps upon the
Union Road fitted with the Incandescent burners:—
6 lampe from 14th November to 81st December, 1895—47 nights or 744 hours.
5 „ „ 1st January 17th June, 1896 169 „ 1466 „
The Gas Company were compelled to remove the burner from lamp No. 22, upon the
1st January, 1896, owing to the continual jarring and vibration canned by the heavy traffic
at that point, which the mantles would not stand. The figures given below, therefore, only
refer to the five lamps, from 14th November, 1895, to 17th June, 1896, a period extending
over 216 nights, or 2212 lighting hours per lamp. j
Consumption per hour, ordinary street burners 5 cubic fast.
Ditto Incandescent burners, with pilot lights, say - 4.25 do.
Having in gas, ¾ cubic feet per hour per lamp, or 15 per cent. or 8295 cubic feet for the five
lamps during the above-mentioned period.
Average number of mantles used per lamp - 15.
Average life of mantles - 14.4 nights, or 147½ lighting hours.
Cost per lamp, of mantles, forks and chimneys - 16 1½
Saving in gas per lamp at 2s. 3d. per 1000 feet -38½.
Net km per lamp - 12 5
Net loss per lamp per annum- 22s. 10d.
The present net cost of the burner, not included in the above figures, is 9s. 1d., to
which moat be added cost of filing.
Increased illumination taken from experiments mads by the Gas Company - 70 per cent
present increased cost over ordinary burners for maintenance 36 per cent
The Company desire to discontinue the experiments until the autumn owing to extreme
Pressure of business, and as the present times is not favourable to obtain correct results, the
Pressure dry weather tending to prolong the life of the mantles. In an interview I have had
with Mr. Talbot, of the Gas Company, he stated that the Engineer hopes by the autumn to
have perfected an arrangement that will overcomes a great many of the present difficulties.
Resolved- That the Surveyor be instructed to continue the experiments in the Union
Board for the percent.