THE works in this Catalogue are mostly arranged under their Authors' names; but certain classes of publications have been grouped under general headings, as follow

Catalogues.
Exhibitions.

Geological Surveys.

Journals.

Maps. (Including Atlases, Diagrams, Plans, and Sections.)
Mines and Mining.

Miscellaneous.

Models.

Museums.

Reports.

Statistics.

Transactions. (Comprising the publications of Academies,
Scientific and Learned Societies, etc.)

The names of Authors and Societies whose works are thus grouped, are given under their respective letters, and a reference is made to the group or groups in which such works may be found; thus-

Gilbert, Davies. See Miscellaneous, vol. viii. (3); Transactions -Penzance: Roy. Geol. Soc. of Corn., vol. iii. (xii.) Smithsonian Institution, Washington. See TransactionsWashington.

Cross references are also given; thus Royal Society of New South Wales will be found under letter N

New South Wales. Royal Society of. See TransactionsSydney;

under letter R

Royal Society of New South Wales. See TransactionsSydney;

and under letter S

Sydney. Royal Society of New South Wales. See Transactions-Sydney.