XX

CONTENTS.

CHAPTER VI.

Page

An account of the different Explosions from June1794) to October 1813, containing those that have• happened at Harraton, Washington, Lumley,Hepburn, Oxclose, Felling, Harrington, Colling-wood Main, and Fatfield. 39

CHAPTER VII.

The Theories of Burnet, Descartes, Whiston,Woodward, Buffon, and others, on the originalFormation of the Earth, and the Causes of Strati-fication, &c,..... 5S

CHAPTER VIII.

Right of Digging for Coals.—Mode of Tenure_

Sinking of Mines.—Method of Boring, &c.—Draining—Process of Mining.—Description ofWorkings. 69

CHAPTER IX.

Present System of Ventilation.—Its Errors.—NewMethods by Mr. Ryan and Lieut. Menzies.—Steel-Mills. 78

CHAPTER X.

Continuation of Explosions, viz. at Felling, Hep-burn, Leefield, the Success Pit, the Tyne Main,Sheriff’s Hill, and Newbottle Collieries, with thedreadful Inundation of the Heaton Pit, includingfrom 1813 to 1816. 93