104 CONTRIBUTIONS TO A 
is a freshwater pooliin Priglis Bay ; the ground is: sandy, and affords 
masses: of. Littorelia lacustris and Trigonella ornithopodioides.. There 
isa high and: very-dry mass of rock to. the south and west, the only 
Fern on which is Asplenium marinum. 
St. Martin lies to the extreme north-east.” Its southern slopes are 
iie. and. yield. good crops: Most of the soil north and west of 
e Town is sandy, and the remarkable variety of Ophioglossum 
er which I shall notice again at some length, occurs there. 
Bryer is a small island, and very barren to the north): It has a 
freshwater pool east of Gweat Hill. 
Nearly. adjoining Bryer is Samson, entirely uncultivated, though it 
has some good grass fields ; it was formerly inhabited; the ruined cot- 
tages are quite covered with Asplenium marinum: 
The mean summer temperature: of the Scilly Isles is 58°; the mean 
winter temperature is 45°. During my visit the thermometer did-not 
rise. above 62°, or sink lower than 54°. The prevalent: winds. are the 
S.W. and. S.S.W.- The highest land rises about 200. feet above the 
level of the sea... In none of the islands are there any deep valleys or 
gorges, either central or leading down to any of the bays ; nre 
there is little shelter. — 
- Almost thes only:trees! are shal Elm, the: kippi i the Peas the 
Elms are planted as a: protection round the orchards, and are: covered 
with Ivy, The: Apple-trees are said to bear remarkably well, and though 
small and. stunted; they appeared very healthy ; the m orchard be- 
longs to. Mr. Banfield, and is in Holy Vale, St: Ma 
It appeared to me that the soil, in many of the lin wastes, was 
sufficiently- deep. to- be brought under cultivation, if shelter were af- 
forded by shrubs or trees ; js few have been planted for this — 
except round the or 
- The principal wealth. of the islands is derived from the ont of 
early potatoes for the London market. I am informed that cargoes of 
these are shipped as early as e Wheat, barley, p and 
turnips are the principal crops... 
The granite of which the islands 4 are entirely odiniai | is eee 
in that pies old- man warriors rents the heel — him ars € eee que eg 
space: of about y mes feet by by "ues or six. Mr. 3 Maju satel that he had ascertained 
that there was not even a single garden in St. Agnes t enty years before 1850." It 
is difficult to see how it can have got to Scilly. pese Nat. Hist. Ser. 2, viii. ye i) 
