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34
"The following table gives the cost of gas lighting for public and
"private purposes, at the prices which are now charged in Islington:—
Description of Burner.
Candle Power.
Consumption of Gas
per Hour per Lamp.
Cost per Hour, with
Gas at 2s. 2d. per 1,000
cubic feet
for Public Lighting.
Cost per Hour, with
Gas at 3s. 1d. per 1,000
cubic feet
for Private Lighting.
Per
Lamp.
Per
Candle
Power.
Per
Lamp.
Per
Candle
Power.
Ordinary Batswing
10
4.3
.112
.0112
.1591
.01591
Flat Flame
12
4.6
.12
.0099
.1702
.01418
Do. in pairs
30
10
.26
.0087
.37
.0123
Flat Flames
in Clusters
60
15
.39
.0065
.555
.009
90
20
.52
.0058
.74
.0082
150
30
.78
.0052
1.11
.0074
"In order to compare this with the cost of electric lighting, take
"the case of a 12-candle power flat flame burner, which costs 0.17 of a
"penny per hour, equivalent to 0.23 of a penny for 16-candle power.
"A 16-candle power electric light uses 0.056 of a supply unit per
" hour, which makes the cost come out as follows:—
0.224 of a penny per hour at 4d. per supply unit.
0.28 „ „ 5d. „
0.336 „ „ 6d. ,,
0.392 „ 7d. „
0.448 „ „ 8d.
"It will be seen, therefore, that the cost of the electric light is
"about the same as gas where the current is charged at about 5d. per
"supply unit"
Mr. Robert Hammond, in an address recently delivered by him
at Burton-on-Trent, gave his opinion that the actual cost of the light
would be from a quarter to half as much again as gas as charged at
Burton. He said—"In Burton gas is 2s. 9d. per 1,000 feet; the