1

ft

J.a,

A TREATISE

r:-4 9 L r J38 7

ON THE

COAL MINES

OF

DURHAM AND NORTHUMBERLAND;

WITH INFORMATION

RELATIVE TO

THE STRATIFICATIONS OF THE TWO COUNTIES:

o • AND CONTAINING

ACCOUNTS

OP THE

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WHICH HAVE OCCURRED THEREIN FOR THE LAST TWENTY YEARS;

THEIR CAUSES,

AND THE

MEANS PROPOSED FOR THEIR REMEDY,

AND FOR THE GENERAL IMPROVEMENTSOF THE

MINING SYSTEM,

BY NEW METHODS OF VENTILATION, 8>c.

BY J. H. H. HOLMES, ESQ. F.S.A.

WITH PLATES.

LONDON:

PRINTED FOR BALDWIN, CRADOCK, AND JOY,47 , PATERNOSTER ROW.

1816