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31
APPENDIX.
Dr. Aldis having been appointed by the Vestry Gas
Examiner under the Metropolis Gas Act, 1860, on
February 21st, 1861, was ordered to report monthly.
He had, therefore, six gases to test instead of one as
formerly, and performed the experiments in the rooms
provided by the Chartered Company, at No. 4, Cannon-row,
Westminster; by the London at No. 73,
Bessborough-street; and by the Equitable at No. 78,
Cambridge-street. Each room contained a photometer,
with other necessary apparatus, for taking the illuminating
power of the gas.
Sulphur Determinations.
The result of the sulphur determinations mentioned in
a report to the Vestry dated February 21 st, 1861, is, that a
quantitative analysis for sulphur in the cannel gas supplied
by the London Company on January 14th, 15th, and
17th, produced 16.51, 17.54, and 5.2 grains respectively
in 100 cubic feet, the Act allowing 20 grains of sulphur.
But it must be remembered that sulphur in the form of
sulphuretted hydrogen produces a much more deleterious
effect than that of the bisulphide of carbon. This is the
first time that sulphuretted hydrogen had been detected,
and its presence was attributed to an accident.