PRINTED BY WILLIAM CLOWES AND SONS, LIMITED, LONDON AND BECCLES.

THE SEPTIC TANK COMPANY, Ltd.,

I, VICTORIA STREET, WESTMINSTER.

AUTOMATIC CONTROL

OF

SEWAGE PURIFICATION.

Our Automatic Distributing Valves Send the Sewage to the Beds in

regular sequence.

Our Automatic Spreaders

Distribute the Sewage evenly over

the Beds.

Our Automatic Measuring Valves Regulate the Sewage flow as regards either time or quantity.

MATHER & PLATT, Ltd.

SALFORD IRON WORKS,

MANCHESTER.

Treatment of Sewage.

Patentees and Sole Licensees of many very valuable
inventions in relation to

FILTER PRESSES,

AIR COMPRESSORS,

SEWAGE PUMPS,

SEWAGE SLUDGE MIXERS,

LIME MIXERS.

Sewage Distributor,

FOR LARGE FILTER BEDS

(Scott Moncrieff's Patents).

Applicable to any system of Sewage treatment involving filtration.

MAY BE MADE ANY SIZE.

Refuse Destructor Furnaces.

Incinerators for Cremating Hospital Refuse.

Steam Disinfecting Apparatus.

ENGINES and BOILERS, &c.

CORRESPONDENCE

INVITED.

Crown 8vo, cloth, 362 pages. 9s. net.

WATER AND ITS PURIFICATION.

A Handbook for the Use of Local Authorities,
Sanitary Officers, and others interested
in Water Supply.

BY

SAMUEL RIDEAL, D.Sc.(Lond.).

WITH NUMEROUS ILLUSTRATIONS AND TABLES.

Second Edition, Revised and Extended.

London CROSBY LOCKWOOD & SON, 7, Stationers' Hall Court, E.C.

Fcap. 8vo, leather, 460 pages. 10s. 6d. net.

THE HEALTH OFFICER'S POCKET-BOOK

A Guide to Sanitary Practice and Law for Medical Officers of Health, Sanitary Inspectors, Members of Sanitary Authorities, Etc.

BY

EDWARD F. WILLOUGHBY, M.D.(Lond.),

D.P. H. (LONDON AND CAMBRIDGE),

AUTHOR OF

"HYGIENE AND PUBLIC HEALTH," ETC.

Second Edition, Revised and Enlarged.

London CROSBY LOCKWOOD & SON, 7, Stationers' Hall Court, E.C.