120
GAS-LIGHT.
Copy of' a paper laid before a committee of the House of Commons , showing)only the relative values of the gases produced at the under mentioned places, ®showing in like manner the relative economy of gas, as produced at the di&& eplaces, over candles. By Joseph Hedley, Esq.
Illuminatin'
The Jet of
power of i
Gas burnt
Gas required
single Jet o
four inches
to be equal to
Sellins
Cost of Gas
Average dis-count allow-ed off thecharge for
Net cost of
Gas-name
high, con-
100 lbs. of
[price o
equal in il-
where Experimentswere made.
four incheshigh, taken
sumed perhour anc
mould
Gas peTmeter per1000 cubic
laminatingpower to
Gas equal to100 pounds of
by a com
the lb., 9inches longeach.*
100 pounds
Candles.
narison ofShadows.
feet.
of candles.f
column.
Equal toCandles,
Cubic Feet,
Cubic Feet.
s. d.
Per Cent.
Birmingham and 1Staffordshire ; f
2572
1-22
2704
10 0
1 7 0
9
1 1 7 ■
two Companies JStockport - - .
3*254
*85
1489
10 0
0 14 11
124
0 13 0
Manchester- - -Liverpool Old fCompany:? - j
3*060
2*369
*825
1*1
1536
2646
8 0
10 0
0 12 3
1 6 5
a?
6i
0 10 10
1 4 9
Liverpool New 1Gas Company (
4*408
*9
1164
10 0
0 118
61
0 9 10
Bradford - - - -
2*190
1*2
3123
9 0
1 8 1
124
1 4 6
Leeds.
2 970
*855
1644
8 0
0 13 2
64
0 12 4
Sheffield - - - -
4*434
1*04
2440
8 0
0 19 6
6*
0 18 3
Leicester - - -
2*435
11
2575
7 6
0 19 3
15
0 16 5
Nottingham - -
1.645
1*3
4200
9 0
1 17 9
15
1 11 3
Derby - - - -
1*937
1*2
3521
10 0
1 15 4
15
1 10 o
Preston - - - -
2136
I* 15
3069
10 0
1 10 8
15
1 6 2
none
1 10 11
2*083 •
1*13
3092
10 0
1 10 11
allowed.
SSI*
So GM '
.541
■534
•580
•420
•530
■466
•528
•424
•448
■419
* 100 lbs. of candles are estimated to burn 5,700 hours, f The candles cost 3/. 2r. 6 d. . .. , j to
4 The Liverpol Old Company have since resorted to the use of Cannel coal, and consequently very nearly assimnaLiverpool New Company in illuminating power. _ ^ _
Memorandum. —It will not fail to he observed that in deducing the comparative * e>between candles and gas by these, experiments, the single jet (and in every ■l ns - ( j e iliyof course, it was the same), has been the medium. This, however, though. C1the most correct way of making the comparative estimate t*f the illuminating^
ai r
of the several gases, is highly disadvantageous in the economical comparison, inasm u
as gas burnt in, a properly regulated argand burner, with its proper sized gm ^ e daperture, and sufficient number of holes, gives an advantage in favor of gas c0 ”? me itin an argand, over a jet burner, of from 30 to 40 per cent. At the same } ^ ;tmust not be overlooked that in many situations where great light is not re 1 u * s ofwill be found far more economical to adopt the use of single jets, which by me ,^ eS; inswing brackets and light elegant shades, become splendid substitutes for can ’banking establishments, offices, libraries, &c., &c. -rail)')
Note. —In Glasgow, Edinburgh, Dundee, Perth , and the Scotch towns, S e raV itythe Parrot or Scotch Cannel coal is used ; in illuminating power and spec!he g ^ n( j,, the gas produced is equal to that from the best description of Cannel coalm j 0 rThe price per 1,000 cubic feet ranges about 9s., with from 5 to 30 per cen ]p>g.discounts, leaving the net price about 9s., to be equal in the above table toof candles. , . a ] ; and
Epitome of Experiments made in Gas produced from different qualities ^ m nany’ 3consumed in different kinds of Burners, tried at the Sheffield Gas Light ^ JosephWorks, and laid before a Committee of the House of Commons .
Date
1636.
Description ofBurner.
SpecificGravity olGas.
con-
sumed
per
hour.
Heightof Gas-flame.
Equal toMouldTallowCandles , 6 tothe pound, 9inches longeach.
Gas equal toJ00 poundsofJiouldCandles.
May
8-
9
9
8
9
i_L
Single JetDitto
Ditto
( Argand 1/ 14 holes JDitto
Ditto
Deep Pit
Mortormley
Cannel
Deep Pit.
Mortormley
Cannel
*410
•450
*660
*410
•450
•660
Inches
75
74
61*
34
33
29
Cubic
Feet.
1*
•95
•7
3-3
3-1
2*6
Inches.
4
4
4
r
Candles.
2*36
2434
3*54
11-53
12*24
15-85
Cubic Feet.
2415
2224
1127
1631
1443
935
Cost of Gasat 8s
cubic feet