CONTENTS. 
Introduction —shewing the necessity of local investigation before 
rules and first principles can be instituted, or Natural History be 
satisfactorily pursued as a science.—Notice of the rules followed in 
the framing of the zoological maps. 
PART I. 
Chapter I. — Remarks on the general aspect of the district. —Its 
threefold character.—Description of the scenery of Dartmoor.— 
Description of the scenei’y of the South Hams.—Scenery of the 
Coast. ..... Page 1 to 12. 
Chapter II. —Ancient Geology.—Granite and its modifications 
form the bed on which our other rocks are supported,—Dartmoor a 
mountain range.—Bovey Heathfield formations,—supposition re¬ 
specting them.—Granite of Dartmoor characterised.—Climate, 
herbage, and products of the Moor,—its waters.—Dartmoor former¬ 
ly being wooded, had a different climate to that it at present has.— 
Proposed measures to ameliorate its climate,—further considerations. 
Planting.—Mica schist, Serpentine and Schorl around the Granite.— 
Trapp; its intrusions in slate and action on limestone.—Granite 
and its modifications,togetherwith Serpentine and Trapp are igneous 
and upthrust rocks, and have made their appearance in their present 
positions since the deposit of others,— some of these were however 
in their present sites at the time of the deposit of the secondary 
rocks,—proof afforded from a granite pebble in slate rock,—Boul¬ 
ders on Roborough Down, and between the Tamar and Tavy; also at 
St. Anne’s Beacon.—Observations connected with the new theory of 
intruded rocks,—action of granite and trapp on other rocks by in¬ 
trusion.—Discrimination of igneous rocks from others.—Subterra¬ 
nean movements of granite and trapp exhibit their consequences 
on Slate, &c.—Contrariety of circumstances under which granite 
makes its appearance.—Igneous action evinced in Trapp.—Some 
tors of Dartmoor are ancient craters ?—Period of these igneous 
disturbances.—Blendings of the primitive series.—Blendings of the 
grauwacke series.—Blendings of our rocks from the coast onwards 
to the Moor.—Inclusion of some of the igneous rocks among the 
grauwacke series.—Only one legitimate way of theorizing in 
Geology.— Slateoi South Devon jits differentkinds are in connection, 
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