546 



INDEX. 



Page. 



Castor Fiber, L. Fossil Remains of the, found in Scotland, 207 

 Cat, new species of, 170 

 Clackmannanshire, observations on the Coal-field of, 123 

 Clinkstone, columnar, - - 241 



Coalrfield of Clackmannanshire, additional observations on, 

 by Robert Bald, Esq. 123. — Recapitulation, ibid. 

 — Bones supposed to belong to the Whale or 

 Grampus tribe, 135. — Oak trees found in the re- 

 cent alluvial cover of the river Devon.- — No or- 

 ganic remains in the old alluvial cover, though 

 plentiful in the coal beneath, 126. — Beds of coal 

 rest always on a stratum of fire-clay, 127 — Dip 

 and dislocation of the Coal-field, 128. — Number 

 of strata, 129* — Contrary dip of the south Coal- 

 field, 130. — Extreme hardness of some masses of 

 Sandstone, 132. — Ochill Mountains, 135. — John- 

 stone Coal-field.- — Brora Coal-field, — and Staf- 

 fordshire Coal-field, exceptions to the general 

 form, 135. — Absolute form of Coal-fields, 141. — 

 Organic remains, 149- — Tabular beds of coal, 

 150. 



Cork, Observations on the Mineralogy of its neighbour- 

 hood, - - 83 



Crystals, on the Connection between the Primitive Forms 

 of, and the Number of their Axes of Double Re- 

 fraction, by David Brewster, LL. D., 50. — Crys- 

 tals arrange themselves according to the num- 

 ber of their axes, under a certain series of primi- 

 tive forms, 51. — Table shewing this connection, 

 52. — Table containing other crystals, the num- 

 ber of whose axes are ascertained, and which may 

 be referred to certain classes of primitive forms. 

 —1st Class, 57.— -2d Class, 58.— 3d Class, 60.— 

 Table of those crystals possessing double refrac- 

 tion, whose number of axes is not determined, 



