mentioned in the text.

Finally, we have to thank for assistance in the experimental work
Messrs. Bailey, Beswick, Clarke, Grant, Higgins, and Smith.

THE AUTHORS.

CAMBORNE, _Nov. 1889_.




CONTENTS.


PART I.


A TEXT-BOOK OF ASSAYING.




CHAPTER I.

INTRODUCTORY.


Assaying has for its object the determination of the quantities of those
constituents of a material which add to or detract from its value in the