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pointed, that the use of horse dung be discontinued and
brick walls erected instead, and that a ventilating shaft be
constructed higher than the adjoining houses.
The proprietors being most ready and willing to carry
out any suggestions have already incurred considerable
expense.
APPENDIX. No. IV.
GAS.
Eighty 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, 78 Cambridge-street, and No. 1
Ebury Bridge-road respectively.
The gases were burned in accordance with the Metropolis
Gas Act, 1860, and the illuminating power continued
above the standard light, except on April 24th, when the
cannel gas from the London Company gave a light equal
to 17.6 7 instead of 20 sperm candles.
With regard to the purity of the gases, they were free
from sulphuretted hydrogen, and so far free from ammonia
that they did not discolour the turmeric paper.

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