INDEX. 15 3'

Page

Coal, annual consumption of.. .... v....... 20

-, wliere deposited... 25

-, duration of.. 25

-, where found. 27

--, origin of.... 27

.-, glance.•,. 28

-, chemical properties of. 28

i-, when first used. 35

-, right of digging for. 69

.-, how worked out. 74

■-, small, waste in. 225

Coal owner, his difficulties. 222

Coal trade.227, 249

-, persons employed in. 235

Coaly hill, dyke at. 23

Collingwood Main, explosion at. 50

Cologne coal. 17

Commissioners to regulate collieries. 215

Cuiver, on the organic system of nature. 64

Customs, old, bad effects of.... 170

D.

Dalton, Mr., on carburetted hydrogen...,....... 29

Davy, Sir H., on ditto.-. 29

__ , his experiments on ditto. 191

_-, his lamps. 195

__ , on metallic tubes. 195

--, on safety canals. 196

■-, on wire gauze apertures. 196

___description of his lamps.... . 199

__, observations on paper on ditto, in

the Edinburgh Review. 202

Derwent river.. 6

Descartes, his theory. 59

Dewar, Dr., on destroying fire and choak-damp.... 164

Draining of mines... 73

Durham, county of. 1

-, ancient history of. 2

-■, privileges of.. 2

Duty on coals in aid of permanent establishment... 216

. .in general. 236

--paid yearly. 250

4