ON

METALLURGY

OF

GOLD, SILVER, COPPER, LEAD, AND ZINC

INTERNATIONAL CORRESPONDENCE SCHOOLS

SCRANTON, PA.

STEAM AND STEAM-BOILERS

STEAM ENGINES

ELEMENTARY CHEMISTRY

CHEMISTRY AND CHEMICAL OPERATIONS

BLOWPIPING

MINERALOGY

ASSAYING

105

SCRANTON

INTERNATIONAL TEXTBOOK COMPANY

Copyright, 1898, 1899, by THE COLLIERY ENGINEER COMPANY.
Copyright, 1902, by INTERNATIONAL TEXTBOOK COMPANY.

Entered at Stationers' Hall, London.

Steam and Steam-Boilers: Copyright, 1893, 1839, by THE COLLIERY ENGINEER
COMPANY.

Steam Engines: Copyright, 1894, by THE COLLIERY ENGINEER COMPANY.
Elementary Chemistry: Copyright, 1899, by THE COLLIERY ENGINEER COMPANY.
Copyright, 1902, by INTERNATIONAL TEXTBOOK COMPANY.

Chemistry and Chemical Operations: Copyright, 1902, by INTERNATIONAL TEXT-
BOOK COMPANY. Entered at Stationers' Hall, London.

Blowpiping: Copyright, 1893, 1894, 1898, 1899, by THE COLLIERY ENGINEER COM-

PANY.

Mineralogy: Copyright, 1893, 1894, 1898, 1899, by THE COLLIERY ENGINEER COM-

PANY.

Assaying: Copyright, 1893, 1899, by THE COLLIERY ENGINEER COMPANY.

Steam and Steam-Boilers, Key: Copyright, 1894, by THE COLLIERY ENGINEER
COMPANY.

Steam-Engines, Key: Copyright, 1834, by THE COLLIERY ENGINEER COMPANY.