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15
ferent pressures on the mains and the burners, which has
been inserted in my Reports to the Vestry.
Although the illuminating power of some of the gases
has been unusually good during my examinations, yet the
pressure was sometimes low, which may be seen by referring
to the Report, dated March 3rd, 1864. This can be easily
explained; for example—the common gas supplied by the
Chartered Company, on Feb. 10th, gave a light equal to nearly
17 instead of 12 sperm candles, when the pressure on the main
was only 6/10ths of an inch; but the day being foggy, and the
storage for gas at the works being inadequate to the public
demand, the gas was enriched in order that the pressure
might be diminished. The Company, however, are now
erecting a very large new gas-holder, to contain one million
six hundred thousand cubic feet.
A Table and Summary were sent with each Monthly
Report on the gas to the Vestry, containing the number of
examinations and the pressures, with the dates, and the
weekly and monthly average illuminating power.
C. J. B. Aldis, M.D.,
Gas Examiner.