470 INDEX. 



PAGE 



Morwel Down, in Devonshire, description of the tunnel through 146 

 Mountain limestone, forms an elliptical basin in the neighbour- 

 hood of Bristol 210 



, coal measures resting on it . . 211 



Needlestone, found in Sky 189 



Northumberland, Mr. Bennet's account of a whin dyke in . 102 

 Northumberland and Durham, N. J. Winch, Esq. on the 



Geology of 1 



Nuts, filled with calcareous spar, found in Belfast Lough . 443 



Okehampton, height of 437 



Old red sandstone. See Red Sandstone, Old. 



Olivine, found in grains imbedded in the basalt of Teesdale . 74 



found in Sky ........ 189 



Oolite, stratum of found in the magnesian limestone beds at 



Hartlepool 7 



Organic remains found in the magnesian limestone . . 10 



— found in the coal measures . . . 19 



none marine, among those of the coal measures 20 



in the lead mine measures . . . 71 



in the limestone of Sky . . 169,175,176 



Paralcl Roads of Glen Roy, Dr. Mac Culloch on the . . 314 



Paramoudra, description by Mr. Buckland of the fossil so called 413 



its mineral History connected with that of many 



spungiform bodies found in chalk . . . . 416 



Pentowan. Mr. Smith on the stream works of 404 



Pen-y gant, height of 435 



Petroleum, found in the black rock of Bristol . . . 199 

 Phillips, William, Esq. Account of some attempts to ascertain 

 the angles of the Primitive Crystals of Quartz and the 



Sulphate of Barytes 233 



— On the measurements, by the reflect- 

 ing Goniometer of certain primitive crystals; with obser- 

 vations on the methods of obtaining them by mechanical 

 division along the natural joints of crystals . . . 241 



