Chapter I: Front Matter

Transcriber’s Notes:

Underscores “_” before and after a word or phrase indicate _italics_
in the original text.
Carat symbol “^” designates a superscript.
A single underscore between two characters indicates a subscript.
Equal signs “=” before and after a word or phrase indicate =bold=
in the original text.
Small capitals have been converted to SOLID capitals.
Illustrations have been moved so they do not break up paragraphs.
Typographical errors have been silently corrected but other variations
in spelling and punctuation remain unaltered.

PYROMETRY

_BY THE SAME AUTHOR_

HEAT FOR ENGINEERS

A TREATISE ON HEAT WITH
SPECIAL REGARD TO ITS
PRACTICAL APPLICATIONS

Third Edition, revised, with 110 illustrations,
xiv + 430 pp. Demy 8vo. Price 12s. 6d. net.

LIQUID DROPS AND
GLOBULES

THEIR FORMATION AND MOVEMENT

THREE LECTURES DELIVERED
TO POPULAR AUDIENCES

With 43 illustrations, x + 84 pp. Crown 8vo,
cloth. Price 3s. net.

E. & F. N. SPON, LTD., HAYMARKET, LONDON, S.W. 1

PYROMETRY

A PRACTICAL TREATISE ON
THE MEASUREMENT OF HIGH
TEMPERATURES

BY

CHAS. R. DARLING

ASSOCIATE OF THE ROYAL COLLEGE OF SCIENCE, DUBLIN; WHITWORTH
EXHIBITIONER; FELLOW OF THE INSTITUTE OF CHEMISTRY; FELLOW
OF THE PHYSICAL SOCIETY, ETC.

LECTURER IN PHYSICS AT THE CITY AND GUILDS TECHNICAL COLLEGE,
FINSBURY, E.C.

AUTHOR OF “HEAT FOR ENGINEERS”

SECOND EDITION, REVISED AND ENLARGED
SIXTY-NINE ILLUSTRATIONS

_London_
E. & F. N. SPON, Ltd., 57 HAYMARKET, S.W. 1
_New York_
SPON & CHAMBERLAIN, 120 LIBERTY STREET
1920

Contents

PAGE

PREFACE TO SECOND EDITION ix