Work (W.)—Is a volt multiplied by a coulomb, or (amp.² × sec × ohm) or (amp. × sec × volt). The Unit is the Joule.

Yoke.—Is a term applied to the apparently neutral mass of iron which connects the poles of a horse-shoe magnet at the back.

Appendix I.—Principal Electric Lighting Stations
in Great Britain.

Name of
Station.		Approximate
No. of Lights.		Systems
employed.		 Approximate length
of longest main
supply conductor
in miles.		 Main conductor
overhead or
underground.
Incandescent or
Glow Lamps.		Arc.
Brighton Electric-
Light Company		 1,80040 High-tension
lamps in
multiple series
Brush Dynamos		20 Overhead
Cadogan Electricity
Supply Company
(New Company)		 · ·· · Edmunds’ system
of Battery
Transformers		2 Overhead
Eastbourne 1,70030 Lowrie Hall
Transformers		15 7 miles
underground
Grosvenor District
Electrical Supply		 20,00040High-ension
with Ferranti
Transformers
primary
2,400 volts,
secondary
200 volts,
Ferranti
dynamos		6 circuits,
total about
70 miles		 Overhead
Kensington Court
Electric Lighting
Company		1600 to be
extended
to 10,000		· ·Crompton
105 volts
low tension,
constant supply
by means of
accumulators		¼ Underground
Liverpool 1,000· ·Low tension
continuous
current
dynamos		 · ·Overhead
and
Underground
Leamington 1,500· ·Chamberlain
and Hookham
dynamos with
accumulators		1¼ Underground
Paddington
Electric Lighting		 4,115
16 C. P.
lamps		98
3,000
C. P.		E. M. F.
150 volts,
Gordon
alternating
current
Dynamos		3 Underground
Barnet and District E.
Supply Company
(New Company)		· · · ·Joel Dynamos 5Overhead
chiefly
Chelsea E.
Supply Company
(New Company)		 · ·· · · ·· · · ·
St. James and
Pall Mall
(New Company)		 · ·· · Continuous
current		· · · ·
Taunton · ·23Thompson
Houston
continuous
current		· · Overhead
Whitehall Court
(New Company)		 · ·· · Battery
Transformer
system		· · · ·
Westminster · ·· · · ·· · · ·
West Brompton · ·· · Lowrie Hall
Transformers		10 miles
when
completed		 · ·
Adelphi Theatre 4,000· ·Continuous
current
dynamos
coupled direct
to engines		12
external
circuits		 Overhead
and
Underground
Bath
(New Company)		 · ·85Thomson
Houston
Dynamos and
Transformers		· · · ·

Name of
Station.		Approximate
area of
distribution.		Working
Capital.		Hours of
Supply.		Charges.Remarks.
By Meter.By yearly
fixed amount.
Brighton Electric-
Light Company		About 3
square miles
£12,000ConstantMeter rent
21 s. 8 d.
per annum

Glow lamps, 1 s. per unit, or rather over ¾ d. per lamp per hour. Arc lamps, 4 s. per lamp per week including maintenance

If consumption
is below
100 units
quarterly,
10¾ d. discount.
Cadogan Electricity
Supply Company
(New Company)		Belgravia and
Cadogan
Estate		£20,000· ·· ·· ·· ·
Eastbourne· ·£20,000Constant· ·According to consumption
averaging about 6½ d.		A similar
station
at Hastings.
Grosvenor District
Electrical Supply		Very irregular district,
a house is
lighted 2 miles
from the station		£375,0008 a.m.
to
3 a.m.		7½ per Board
of Trade unit		· ·A station at Deptford
is under erection
to maintain
200,000 lights.
Kensington Court
Electric Lighting
Company		The streets adjoining
the station, the
mains to be continued
to another station at
Knightsbridge		£25,000ConstantBy meter and
minimum charge
of 10 s.
per annum

8 d. per unit, equal to 0·56 d. per 20 C.-P. lamp per hour, or 0·28 d. per 10 C.-P. lamp. Shops taken at £2 per annum per 20 C.-P. lamp minimum of 10 lights

District embraces
residences, shops,
public hall,
and church.
Liverpool· ·£20,000· ·By meter on
sliding scale		First 400 hours, 1 s. per unit
Second ” ” 8 d. ” 
Afterwards4 d.  ”  		Board of Trade
license for six
years, hotels, shops,
and residences.
Leamington183
street
lamps		· ·Constantmeter

Street lights £2 2 s. per annum for 2,860 hours, including renewals. 1 to 40 units per quarter 8 d. per unit. 41 to 150 units per quarter, 6 d. per unit. 151 units per quarter 4 d. per unit

· ·
Paddington
Electric Lighting		67 acres· · Constant · ·Worked by
G. W. Railway		The district
between
Paddington and
Westbourne Park
is lighted
throughout.
Barnet and District E.
Supply Company
(New Company)		· ·£5,000· ·· ·· ·71 lamps in
streets on posts
12 ft. high.
Chelsea E.
Supply Company
(New Company)		· ·· ·· ·· ·· ·· ·
St. James and
Pall Mall
(New Company)		· ·· ·£20,000· ·· ·Area to be
lighted
adjoining
station.
TauntonStreet lighting· ·· ·· ·By yearly contractArc lamps of
1200-C.-P.
Whitehall Court
(New Company)		To light hotels
in
Northumberland
Avenue		£24,753ConstantProposed
meter-rent
10 s. per
quarter

Proposed charge, 8 d. per unit with minimum of £1. 1 per lamp per annum

Amalgamated
with the
Metropolitan
Electric
Supply Company.
Westminster· ·· ·· ·· ·· ·New
Company.
West
Brompton		· ·· ·ConstantBy meter

The station is being erected by the House to House Lighting Company, who also propose installations in other districts.

Adelphi
Theatre		The buildings
are close
together		Private· ·· ·

The Adelphi Theatre, Adelaide Gallery, and Strand Restaurant are lit, the machinery being fixed in a basement about 30 × 45 feet. No gas is laid on.

Bath
(New Company)		Arc lights
· ·· ·· ·Yearly contractThe power obtained
from town weir
supplemented
by steam-engine.