PDF BOOK Hints on amalgamation and the general care of gold mills.

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A REFERENCE BOOK OF ACTUAL, GOLD-MILL PRACTICE, AS
DETERMINED BY AN EXPERIENCE OF TWENTY YEARS
WRITTEN IN LANGUAGE THAT CAN BE
UNDERSTOOD BY ALL.

BY W. J. ADAMS.


Introduction 7

Chapter;i General Process 11

Arrangement of Mortars ...... 17

" " Plates 21

" " Concentrators .... 30

for Canvas Plant .... 34

2 Care of Quicksilver 35

Amalgamation 43

" 3 Cleaning-up 60

" 4 Retorting and Melting 73

" 5 Concentration 85

6 Sampling 98

" 7 Conclusion ,108



INTRODUCTION.

Gold has been known from the earliest ages, from its
occurrence in a metallic state in sedimentary deposits
as well as in veins. On account of its great specific
gravity, it can be collected from placers and river beds,
by separation with water alone, and in veins after the
matrix is crushed, a great amount is saved by the same
simple method. When only rich deposits were exploited,
anybody could manage as it apparently required only
labour and opportunity, while as long as money was
made, the losses that occurred did not trouble the owners.
From this very simplicity of working, the majority
of owners and investors imagined that no special
training was requisite to insure success, but that any
trustworthy man, skilled in mercantile pursuits, was
the proper person for the place of general manager.
To-day the same opinion is held by very many, in spite
of the warnings from hosts of disastrous failures. One
cause for this belief has been the lack of literature for
this special branch of metallurgy; in fact, very near
1890, there was practically no works written at all
which spoke of gold except as a subsidiary product
of the metallurgy of other metals. Volumes, both practical
and scientific, have been published which deal with
the special branches of the metallurgy of lead, copper,

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