194 
PEEFACE. 
are intimately connected or dependent, and by the use of sub- 
classes where several are referable to one secondary head. To those 
which are known to have passed through more than one edition an 
asterisk is prefixed. An index of a semi-biographical character 
shows what are the writings of every author mentioned. 
Most of the references and abbreviations used are self-explanatory. 
Still, in order to avoid the chance of error, it has been thought 
desirable to annex a complete list : Ann. of Phil. — Annals of 
Philosophy ; Ann. and Mag. Nat. Hid. — Annals and Magazine of 
Natural Histonj ; Brit. Med. Ass. Trans. — Transactions of the 
British Medical Association; Devon. Ass. Trans. — Transactions of 
the Devonshire Association; Geo. Soc. Trans. — Transactions of the 
Geological Society; Geo. Surv. Mem. — Memoirs of the Geological 
Survey; Journ. Bot. — Journal of Botany; Linn. Trans. — Transac- 
tions of the Linnsean Society; Loud. Mag. — Loudon'' s Magazine of 
Natural History; Med. Com. — Medical Commentary; Med. Mem. 
— Medical Memoirs; Phil. 3Iag. — Philosophical Magazine; Phil. 
Trans. — Philosophical Transactions ; Phil. Soc. Trans. — Transactions 
of the Philological Society; Phyt. — Phytologist ; Plym. Inst. Trans. 
— Transactions of the Plymouth Institution ; Plym. Meeting Brit. 
Ass. — Plymouth Meeting of the British Association ; Proc. Geo. 
Soc. — Proceedings of the Geological Society; Quar. Jour. Geo. — 
Quarterly Journal of Geology; E.C.P.S. — Royal Cornwall Poly- 
technic Society; R.C.G.S. — Royal Cornwall Geological Society. 
Por some it may be needful to add that until 1824 Devonport was 
known as Plymouth Dock. 
It is a necessary condition of compilations of this class that 
absolute completeness is unattainable. The first local work in this 
direction was performed by Mr. J. C. Bellamy, who, in 1850, 
printed a catalogue of *'all works relating to Devon and Cornwall," 
the fruit of the labour of several years. It contains the titles of 
256 publications. The list here given, with its 1900 entries and 
more limited area, covers a period of three centuries, and must 
still have many omissions. Doubtless some of these will readily be 
supplied by those into whose hands it may fall. I am, however, 
sanguine enough to believe, that for the most part they will be 
found of small importance. The Catalogue has swollen far beyond 
the proportions anticipated when, some years ago, I took the 
matter in hand ; and my chief sources of information now appear 
dry. 
