Advertisements.

{ Srpuscay, News,
Feburary 28, 1879,

Now ready, royal 8vo. cloth extra, price £2 12s. 6d.
A PRACTICAL TREATISE
DN THE

MANUFACTURE 5 SULPHURIC ACID.

By A. G. LOCK and C. G. LOCK.
Consulting Chemical Engineers.

WITH ABOUT 80 CONSTRUCTION PLATES, DRAWN TO SCALE MEASUREMENTS,
AND OTHER ILLUSTRATIONS.

EPITOME OF CONTENTS.
proposed by the Noxious Vapours Committee,
and other legislative measures. Concentration
of the Acid in Leaden Vessels, both open and
in vacuo ; a complete account of the erection
and working of Glass Retorts, and arrangement
of the various parts ; details of Platinum Retorts,
their merits and defects, including the most
recent British and Continental inventions; the
advantages of Gas Heating, and Concentration
by Steam; with other plans. Advice as to the
economy of the Waste Produéts of a Sulphuric
Acid Works. Descriptions of the various accessories
 of a Works. Thermometers, Hydro.
meters, Sprengel’s Acid Tester, Taps, Jugs,
Carboys, Pipes, &c.; and a series of most
valuable and récent Tables for the Conversion
of Thermometer and Hydrometer Scales, and
the percentage of Anhydrous Acid. Specific
Gravity and Weight per cubic foot. An examination
 of all the principal plans proposed
for making Sulphuric Acid without Leaden
Chambers. A review of the Bohemian, French,
Winckler’s, Squire's, Messel’s, and Wallace's
plans of manufacturing Sulphuric Anhydride,
and the claims of each system.
Each subje¢t and every branch has been
treated exhaustively from the manufacturer's
point of view, and the work has been rendered
additionally practical by an unusual profusion
of plates, nearly every one of which is drawn to
such a scale, and with such singular attention
to details, that they really form working
. drawings.

Contains a full account of the comparative
values of Brimstone and Pyrites ; of all descriptions
 of Kilns and Burners, both British and
Foreign, how built, how worked, and where
advantageous ; and removal of Arsenic from
Pyrites Acid. An ample discussion on the
shape, capacity, and arrangements of Chambers,
showing the merits and defects of the systems
in use at home and abroad; with remarks on the
supply and admission of Air and Steam, and
observations on Temperature. Particulars of
the working of Sprengel’s Spray Producer and
Burnard’s Nitrate of Soda Solution. A detailed
comparison of Nitrate of Soda with Nitric Acid ;
and hints concerning the cleansing of Chambers,
A whole chapter is devoted to instructions and
illustrations for the erection of Chambers,
Foundations, Timber-work, and Lead-work;
every detail connected with the Testing of the
Lead and its Thickness, Plumbers’ Apparatus.
&c. ; also, descriptions of the Windows, Belllights,
 Drip-trays, Gauges, and improved
Syphons. An exhaustive examination of the
part performed by the Nitric Acid Gas, and the
causes that lead to its loss in the process ; with
full accounts of Woulffe’s Jars, Coke Condenser,
Gay-Lussac and Glover Towers, and their Construction
 ; various Opinions of their Efficacy;
How they may be used with Brimstone Kilns;
Methods of estimating the amount of Nitrogen
in Nitro-Sulphuric Acid ; various Apparatus for
Testing the Gases escaping from the Chamber
System, so as to comply with the restrictions

London : SAMPSON LOW, MARSTON, SEARLE, and RIVINGTON,
Crown Buildings, 188, Fleet Street, E.C.