656 INDEX. 
PAGE 
Galt, a blue clay, so called in Cambridgeshire . , . 114 
Ganges , some circumstances respecting the geology of its 
banks, described . . . . . . . . 346 
Garnets, abundantly disseminated in gneiss, in Ceylon . 319 
Ghauts, composed of primitive rocks ..... 329 
Glass, changes produced in it by heat ..... 12 
Green Sandstone , formation near Folkstone, described . 37 
occurs on the coast of France ... 49 
in the Isle of Mull . . . 372 
Gneiss, occurs in Ceylon. . . . . . . . 314 
minerals in it, enumerated 318 
is found in the Ghauts . . 329 
in the Isle of Man ...... 484 — 486 
Gold , native, history of its discovery in Wicklow . . . 208 
Goniometer, on the measurements by . . . . 308 
Gothland , Isle of, its structure a continuation of that of 
Esthonia t 455 
Granite, stratification of it examined . . . . . 139 
extent and characters of it, in the east of Ireland . 132 
alternations of it with mica slate . . . 164 
varieties of it in Ceylon, described . . 314 
is found forming low islets in the Ganges . . 348 
forms the southern portion of the primitive chain 
of Finland ........ 404 
boulders of it, at the falls of Imatra and in the 
neighbourhood of Petersburg . . . . 430— 341 
occurs in the bed of the river Vouluceer in the 
Island of Madagascar 477 
has been found in the west side of the blue 
mountains New South Wales 480 
its extent in the Isle of Man, described . . 483 — 485 
occurs in the country to the west of Hudson’s Bay . 607 
forms the base of the Table Mountain and the 
Lion’s Head at the Cape of Good Hope . . . 614 
■ veins of it, in schistus, at the Cape of Good Hope . 615 
Granite, is penetrated by veins of basalt at the Cape of 
Good Hope » ♦ . . 616 
