THE EAINPALL OF CORNWALL. 301 



The Lizard district viewed from Penzance presents the aspect 

 of a table land, gently sloping southwards from about 367 feet 

 at Dry Tree, Goonhilly Downs, to 236 feet at the Lizard Town. 

 The geological structure is Serpentine and Diallage rocks, 

 with no hiUs rising above the table land, the rainfall is, of 

 course, slight, nearly the same as that at the Land's End, 

 35-60 Ins., being the amount of fall at St. Euan Major. 



To the west of Helston lie Grodolphin and Tregoning Hills, 

 formed by a boss of intrusive granite, the former 495 feet, the 

 latter 596 feet above the sea. The Eainfall is 38-25 Ins. at 

 Helston and 41-51 Ins. at Antron Lodge. 



The stations grouped around Camborne, lie on the west and 

 north west side of the Carn Brea, and Carn Menalez district. The 

 latter hill (about the centre) is 822 feet high; the country sloping 

 gradually towards the Falmouth Estuary and Helford Eiver, but 

 being in places somewhat broken. To the north of Carn Brea 

 the land falls gently to the sea, whilst on the west there is an 

 undulating country of a height not much exceeding 250 feet 

 which extends towards Hayle ; Crowan (419 feet), and Camborne 

 (230 feet), on the west of this granite Boss, have a rainfall 

 respectively of 48 and 50-73 Ins., whilst at Tehidy (100 feet), 

 nearer the coast, the fall is 41-89 Ins. Eastward of this 

 district lies the Estuary of the Fal with an undulating country 

 around it, the hills nowhere rising much above from 200 to 

 300 feet, and gradually sloping upwards to the Watershed Line) 

 which has here approached the North Coast, and attains a height 

 of between 400 and 500 feet, the average rainfall in the district 

 being from 40 to 45 Ins. The geological formation is Devonian 

 Slate. The Hensbarrow boss of granite hills lies further east, 

 and to the north and north west of St. Austell, Hensbarrow Hill, 

 the highest, being 1034 feet above sea. Sloping northwards to the 

 dreary tract of the Gross Moors and further north, an undulating 

 country extends at places attaining the elevation of more than 

 700 feet ; whilst southwards the fall is more marked towards St. 

 Stephens and St. Aiistell, the low country reaching to the 

 English Channel. The Eainfall on these southern slopes is 

 about 50 Ins., and at St. Columb to the north 45-45 Ins. The 

 centre of the county is occupied by the extensive rugged wild 

 upland tract known as the Bodmin Moors, where some of the hills 



