INDEX, 259

Page

Thomas, Mr., observations of, on establishing an office

at Newcastle, &c.... 214

Thomson, Dr., on the duration of coal. 26

— -, on the mode of working collieries.. 161

— -- , on explosions.- 173

Tyne Main, explosion of. 102

Tyne river ... 5

— . collieries exporting from. 233

y.

Ventilation, danger of obstructions in. 51

-, present system of.'.:.. 78

-, objections to. 82

.. — -, new method of, by Mr. Menzies. 85

■ -, by Mr. Ryan.. 87

W.

Washington, explosion at. 40

Wastes, danger of. 166

. , description of. 167

-, plan of guarding against, by Mr. Ryan,... 167

Water, its operation upon soils and strata.62, 65

Wearmouth, Monk, antiquity of. 6

Wear river... 6

-, collieries exporting from.. 234

Wellington Pit, explosion of. . 213

Whiston, and Woodward, theories of. 60

Whitehaven coal, analysis of. 16

Wire-gauze, security of, to insulate lights... 196

-- —, dimensions of apertures. 196

THE END.

C- Baldwin, Printer,New Bridge-street, London.