Page:The parochial history of Cornwall.djvu/170

128 {| 103 per cent. or 3 per cent above doubled in 30 years.
 * Annual value of the Real Property, as returned to Parliament in 1815 |||£. 8673 |||s. 0 |||d. 0
 * Poor Rate in 1831 |||1293 |||15 |||0
 * }
 * Poor Rate in 1831 |||1293 |||15 |||0
 * }

Present Vicar, the Rev. R. G. Grylls, presented by the King in 1809.

GEOLOGY, BY DOCTOR BOASE.

This extensive parish includes nearly the whole of that granitic patch known by the names of Tregonning and Godolphin Hills; and it also comprises the greater part of the country lying between those hills and those of the opposite range of granite in Wendron and Crowan, called the Forest. Its mines, quarries, and sea cliffs afford most interesting geological sections.

The granite of Godolphin Hill is of the common kind, containing in several places an intermixture of shorl, and it is traversed by numerous thick veins of quartz, which sometimes pass into compact shorl rock. The granite of Tregonning Hill is of two kinds; one fine-grained like free-stone, which is extensively quarried on the western side of the hill, and used for ornamental building, under the name of Breage stone; the other, abounding in talc, and in a state of considerable decomposition, affording, like the similar granites of St. Austell and St. Stephen's, the china clay, which is here worked for economical purposes, but not to any great extent.

The western part of the celebrated mine Whele Vor is situated in Breage; and, as the workings approach the granite, they exhibit a highly interesting arrangement of rocks, the granite and slate alternating in the same manner as they have been observed to do at Delcoath in Cambourne. The composition of these rocks, and the nature of their connection, are very evidently seen