View report page

19
the causes of bad lighting, complaints of which have, from time
to time, been made at this Board.
Bad lighting may result from one or all of four causes:—
1st. The service-pipe from the Company's main may be old and
too small in area to meet the requirements for gas on the part of
the consumer, either because it has become internally rusted and
corroded, or because the consumer has greatly increased the
number of lights in his premises. This cause would operate more
intensely if the gas meter was insufficient in size.
2nd. The internal pipes of the house may, in like manner, and
for the same reasons as above stated, have become too small for
proper delivery of gas.
3rd. The burners used may be such as to develop only onethird
to two-thirds of the effective lighting power of the gas, either
because they are ill-proportioned, or because they have been too
long a time in use, and have become altered in their emission
opening.
4th. With flat flames enclosed in globes much light is obstructed
when the bottom openings of the globes are small, they cause too
quick a draught and render combustion less perfect, and cause
flickering and a lesser development of light from the gas burner.
The average of my observations made during the year gave an
illuminating power always exceeding 16 sperm candles; the
proportion of Ammonia never reached the prescribed quantity of
2.5 grains for 100 cubic feet of gas. Sulphuretted hydrogen was
never detected.
I would ask your attention to the table of Sanitary work which
has been so ably carried out under the direction of your Inspector,
and I beg to thank every Member of the Board for the patience
with which they have listened to, I fear, a somewhat tedious
lleport.