GAS-LIGHT.
569
C°py of a paper laid before a Committee of the House of Commoas, showing not onlyJhe relative values of the Gases produced at the undermentioned places, but showing inhke manner the relative econojny of Gas, as produced at the different places, over can-" es ' By Joseph Hedley, Esq.
Nantes
Iwh? llw Piace sV ” ere experimentsI were matte.
Birmingham ; 1Birmingham and VStaffordshire; [
two Companies JStockport -ManchesterLiverpool Old)Company X jL iverpool New )Gas Company )Bradford *
Leeds
Sheffield - *
Leicester -NottinghamDerbyBreston
Illuminating powerof a single Jet ofGas-flame four inch,high, taken by acomparison ofShadows.
The Jet of Gasburnt, (our incheshigh, consumed per
hour and was equal
the last column.
Gas required to be
equal to 100 lbs. of
mould Caudles, 6
to the lb., 9 inches
long each.*
Selling price of
Gas per meter per
1000 cubic feet.
Cost of Gas equal in
, illuminating power
, to 100 lbs. of Can-
| dles.t
Average discount
allowed off the
charge for Gas.
Net cost of Gas
equal to 100 lbs. of
Candles.
Specific gravity of
the Gas.
Equal to
Candles.
Cubic Feet.
Cubic Feet.
s. d.
L. s. d.
PerCent.
L.
s.
d.
2-572
1-22
2704
10 0
1 7 0
9
'1
4
7
•541
3-254
•85
1489
10 0
0 14 11
m
0
13
0
•539
3-060
•825
1536
8 0
0 12 3
nf
0
10
10
•534
2-369
1-1
2646
10 0
1 6 5
61
1
4
9
•462
4-408
•9
1164
10 0
0 11 8
6J
0
9
10
-580
2-190
1-2
3123
9 0
1 8 1
12J
1
4
6
•420
2-970
•855
1644
8 0
0 13 2
e*
0
12
4
•530
2-434
1-04
2440
8 0
0 19 6
6 t
0
18
3
•466
2-435
11
2575
7 6
0 19 3
15
0
10
5
•528
1-645
1-3
4200
9 0
1 17 9
15
1
11
3
•424
1-937
1-2
3521
10 0
1 15 4
15
l
10
0
•448
2-136
1 15
3069
10 0
1 10 8
15
1
a
2
•419
none
2-083
M3
3092
10 0
I 10 11
allowed.
1
10
11
•412
t The T • ° Can( ^ es are estimated ti^‘milat * ver P°°l Old Company have since resorted to the use of Cannel coal, and consequently very nearly!
the Liverpool New Company in illuminating power. _'_j
betvp A ' NDUflT ’—It will not fail to be observed that in deducing the comparative value0 f een candles and gas by these experiments, the single jet (and in every instance,the Urse ’ ^ was the same) has been the medium. This, however, though decidedlym °st correct way of making the comparative estimate of the illuminating power ofas Sey cral gases, is highly disadvantageous in the economical comparison, inasmucha p e ^ as burnt in a properly regulated argand burner, with its proper sized glass, airn n ^ re? and sufficient number of holes, gives an advantage in favor of gas consumedn °t h ar ^ ant *’ over a jet burner, of from 30 to 40 per cent. At the same time it mustf 0lJn , e overlooked, that in many situations where great light is not required, it will bebrack * ar more economical to adopt the use of single jets, which, by means of swingestaKr ? and Bght elegant shades, become splendid substitutes for candles, in banking^"°Te ^f aments > offices, libraries, &c. &c.
^ a rrot ? as £ ow > Edinburgh , Dundee, Perth , and the Scotch towns generally, theg^ s 0r Scotch Canrrel coal is used; in illuminating power and specific gravity theThe n • Uced * s e< l ua l 1° that from the best description of Cannel coal in England.c °unt 1 ? e * > ? r cubic feet ranges about 9$., with from 5 to 30 per cent, off for dis-Ca udies CaV ^ n " tke ne ^ P r * ce a bout 9s. to be equal in the above table to 100 lbs. of
«JS2*. °**, Experiments made in Gas prodcced from different qualities of Coal , andTried® Mil* c5 ererit kinds of Burners:
ue Sheffield Gas Light Company’s Works, and laid before a Committee of theHouse of Commons . By Joseph Hedley, Esq.
bate!
1835.;
description
Burner.
^?le JetDitto
Ditto] 4rgand(14 holesDittoDitto
Species ofCoal.
Deep Pit
Mortormley
Cannel
Deep Pit
Mortormley
Cannel
Specific gravityof Gas.
Distance ofCandle fromShadow.
Gas consumedper Hour.
Height of
Gas Flame.
Equal to Mould Tallow Can dles , 6 to thepound,9 incheslong each.
Gas equal to100 lbs. ofMould Candles.
Cost of Gas.at 8s. per 1000cubic feet.
Cost of 100 lbs.of Mould Can-dles at 7s. 6 d.per dozen lbs.
J
•410
Inches
Cubic
Feet.
Inches
Candles.
Cubic
Feet.
L. s. d.
75
!•
4
2-36
2415
0 19 3il
•450
74
•95
4
2*434
2224
o l? m
•660
01J
• -7
4
3-54
1127
0 9 0 1
3 2 6
•410
34
3-3
3*
11*53
1631
0 13 0£ (
-450
33
31
U
12-24
1443
0 11 6£ j
•660
29
2-6
3}
15-85
935
0 7 5fj