CLIFFORD PINX

4 WILLIAM PRYCE.

ENGRAVED BY JAMES BASIRE.

THE THEORY AND NATURAL HISTORY OF

STRATA, FISSURES, AND LODES,

WITH THE METHODS OF

DISCOVERING AND WORKING OF TIN,

COPPER, AND LEAD MINE S,

AND OF

CLEANSING AND METALIZING THEIR PRODUCTS;

SHEWING EACH PARTICULAR PROCESS FOR

DRESSING, ASSAYING, AND SMELTING OF ORES.

PRINTED AND SOLD FOR THE AUTHOR,

BY JAMES PHILLIPS, GEORGE-YARD, LOMBARD-STREET;
SOLD ALSO BYB. WHITE, FLEET-STREET; AND J. ROBSON,

NEW BOND-STREET. MDCCLXXVIII.