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23
APPENDIX. No. III.
GAS.
Seventy-three observations were made during the
quarter upon the six gases supplied by the Chartered,
London, and Equitable Companies, at the Works in
Horseferry-road, 73, Bessborough-street, and 78, Cambridge-street,
respectively.
The gases were burned in accordance with the Metropolis
Gas Act, 1860, and the illuminating power continued
above the standard light required by the Act, except on
August the 5th, when the Cannel gas from the London
Company gave an average light equal to 19*59 instead of
20 sperm candles.
With respect to purity, all the gases were free
from sulphuretted hydrogen, and so far free from ammonia
that they did not discolour the turmeric paper.

A Table and Summary were sent with each monthly
report on the gas to the Vestry, containing the number of
examinations with the dates, and the maximum and minimum
light, with the weekly and monthly average illuminating
power.
C. J. B. Aldis, M.D.,
Gas Examiner.