THIS LITTLE WORK IS DEDICATED

BY PERMISSION,

ΤΟ

THOMAS NEWBIGGING, ESQ., M.I.C.E.,

IN RECOGNITION OF HIS EMINENT SERVICES TO THE LITERATUKE

OF GAS MANUFACTURE.

PREFACE.

HE object of this little work is to provide a manual

TH of gas manufacture suitable to the requirements of

young men just starting their training in a gas-works, which shall also serve as a text book for the use of students who are preparing for the examinations of the City and Guilds of London Institute in the subject of gas manufacture. Although there are several excellent treatises on gas manufacture already in existence, I have found in my capacity as lecturer under the City and Guilds, the want of a small book which should just cover the ground included in the syllabus on which the examinations of that body are based, and the present volume has been written with the view of meeting this want. I trust, therefore, that the book will be of service to others engaged in the teaching of the subject.

It will be noticed that I have not touched on the various quantitative chemical tests required in gas-works; my reasons for omitting the same being that in the first place the space at my disposal would not have allowed me to treat the subject in the exhaustive manner necessary to make it clear to a beginner, and, secondly, because I have already gone into the subject very fully in my "Gas Engineer's Laboratory Handbook" (Spon and Co.), to which the student is referred.

I have to express my thanks to Professor Lewes for his kindness in allowing me to make free use of his many ex

cellent papers in connection with gas manufacture, and to Messrs. R. Dempster and Co., of Manchester; Cowan and Co.; West's Gas Improvement Co., Gwynne and Co., C. and W. Walker, and Kirkham and Hersey, for the loan of blocks and for information concerning their various specialities. I have not hesitated to avail myself of the classical writings on gas topics of Messrs. Charles Hunt, T. Newbigging, and L. T. Wright, and have also to acknowledge my indebtedness to the following list of works which have been consulted in the preparation of this volume, and which are recommended to the student for fuller details concerning many of the points herein touched upon:

Bowditch, "The Analysis, etc., of Coal-Gas." (Spon and Co.)

Graham's "The Construction and Working of Regenerator Furnaces." (Spon and Co.)

Hartley's "Gas Analysts' Manual." (Spon and Co.) Herring's "The Construction of Gas-Works." (Hazell, Watson, and Viney.)

Hughes on "Coal-Gas." Revised by Richards. (Crosby, Lockwood and Co.)

Jones, "Sound, Light, and Heat." (Macmillan and Co.) Mackenzie's "Chemistry as Applied to the Arts, etc." (Mackenzie.)

Newbigging's " Gas Manager's Handbook." (King.) The excellent articles on "Coal-Gas" in Vols. 59, 60, 61, and 62 of the "Journal of Gas Lighting." (King.)

The lectures on "Coal-Gas" by Mr. C. Hunt, reported in Vol. 51 of the "Journal of Gas Lighting."

The lectures on "Coal-Gas," by Mr. L. T. Wright, reported in the "Journal of Gas Lighting."

In addition to the above the student will find much valuable information in the following: