CONTENTS.—_Fire Risk Committee—Resistance of
Conductors—Glow Lamps—Sizes of Main and Branch
Conductors—Standard and Birmingham Wire Gauge—Factors
for Calculation—Running of Wires—Switches—Connectors
and Joints—Insulators—Short Circuit—Cut-out, Fusible,
and Automatic—Lamp Holders—Life of Lamps, Electrical
Governor, Speed Gauge—Testing Insulation—Fires and
Accidents from Electric Current—Specification for
Electric Lighting—Instructions for Working—Phœnix
Fire Office Rules—American Fire Office Rules—Electrical
Measurements—Resistance of Copper and German
Silver—English and French Measure—Rules for Fusible
Mica-Foils—Rules for Direction of Current—Number of
Electric Lights to compare with Gas—Motive Power, Steam,
Gas—Motive Power, Water—Explanation of Terms—Price List._
OPINIONS OF THE PRESS.
_The Builder._
“Mr. Hedges points out clearly the risks that are
inseparable from slovenly work and incompetent handling,
and gives clear directions for carrying the main and branch
conductors and the lamp wires, and for calculating the sizes
of the various leads according to the number of lights to be
worked. He insists very properly that some regular system
should be followed, so that it should always be known which
is the positive and which the negative wire,—in other
words, which wire leads from the machine to the lamps, and
which is the return. In addition, however, to showing this
by mere position, _i.e._, by placing the positive wire on
the left side of the negative if vertical, and under it if
horizontal, we should strongly recommend that the insulating
covering should be of different colours on the two wires,
and thus any accidental displacement would not be of
consequence.”
_Revue Internationale de l’Electricité._
“Ce petit livre sans prétention contient une grande
quantité de renseignements pratiques. Tous ceux qui
s’occupent d’éclairage électrique trouveront grand profit à
le consulter.
“Dans les quatre-vingts pages que contient ce travail,
l’auteur a su rassembler toutes les indications nécessaires
et utiles pour effectuer les installations. Il n’était pas
possible de grouper d’une manière plus logique, plus claire
et plus concise les règles à suivre pour assurer le bon
fonctionnement d’une installation d’éclairage.
“L’auteur s’est étendu surtout sur la description et
l’installation des appareils de sùreté, sur la pose des
conducteurs et sur les diamètres à leur donner, sur l’essai
des circuits, etc....
“Un petit dictionnaire, donnent l’explication des terms
techniques, complète d’une manière heureuse ce petit guide
qui sera consulté avec autant de profit que bien d’autres
ouvrages plus étendus et conçus dans un esprit moins
pratique.
“AUG. M.”
_Copies of the above can be obtained from_
The Globe Electrical and Engineering Company,
7, CARTERET STREET, WESTMINSTER, S.W.
Manufacturers of Electrical Supplies.
E. AND F. N. SPON, LONDON.
_Crown 8vo. 156 pp. Cloth gilt. Price 3s._
Useful Information on Electric Lighting.
EMBODYING THE
RULES OF THE FIRE RISK COMMITTEE AND THE
ELECTRIC LIGHTING BILL;
ALSO
PLAIN DIRECTIONS FOR THE WORKING OF ELECTRIC LAMPS
AND DYNAMO MACHINES.
BY KILLINGWORTH HEDGES,
_M.I.C.E., M. Soc. Telegraph Engineers, F.C.S._
_CONTENTS.—Introductory Remarks—The Production of
Electricity—The Voltaic Arc—Division of the Electric
Light—Machines or Generators—Power required, and
Motors—Application of the Electric Light—Choice of a
System—Electrical Measurement—Cost of Working—Result
of Various Installations—Measurement of Light and
Current—Storage of Electricity and Transmission of
Power—Conclusion—Useful Tables and Memoranda._
_The Graphic_,
“At the present time, when the question of illumination
by electricity is fully under discussion, a third edition
of Mr. Killingworth Hedges’ _Useful Information on Electric
Lighting_ is doubly welcome. The little work is now fully
brought up to date, and gives a plain, straightforwardly
written account of the various forms of the arc and
incandescent lamps, and, indeed, of the general system of
electric lighting. Thus a very fair idea of the principle
may be gathered by the general reader, who will find it a
welcome companion when visiting the Electrical Exhibition,
while the manufacturer in search of a practicable light for
his workshop will gain valuable information from the various
hints conveyed in its pages. To the scientific student also
the work will be exceedingly useful, if only from the handy
memoranda and tables in the appendix. _Altogether the book
is the best of the kind that we have yet seen_, and we
cannot refrain from hoping that Mr. Killingworth Hedges may
see fit to bring out a more compendious and detailed work
on the subject, with which he is so eminently competent to
deal.”
_Also, by the same Author, demy 8vo.
Illustrated, 32 pp. Paper. Price 1s._
The Supply of Electricity by Local Authorities.
READ AT THE ANNUAL MEETING OF THE ASSOCIATION OF MUNICIPAL
ENGINEERS AND SURVEYORS, OXFORD, 1883.
All Mr. Hedges’ books are sent post free on receipt of
postal order, by the GLOBE ELECTRICAL AND ENGINEERING
COMPANY, Supply Stores, 7, Carteret Street, Westminster, S.W.
THE
BARNSLEY
CARBON COMPANY.