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Patent Office Library Series: No. 15.
Bibliographical Series : No. 12.]

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LONDON:
PRINTED FOR HIS MAJESTYS STATIONERY OFFICE,

BY DARLING & SON, LD., 34-40, BACON STREET, E.
PUBLISHED AT THE PATENT OFFICE, 25, SOUTHAMPTON BUILDINGS,

CHANCERY LANE, LONDON, W.C.

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This subject list consists of two parts :- (a). A general alphabet of subject headings; with entries in chronological order of the works arranged under these headings; (b) a Key, or a summary of these headings shown in class order..

Under each of these headings the searcher will find entries of all works in the Library which are exclusively devoted to the subject of that heading. For instance, monographs on the “Colorado Beetle” will be found in the general alphabet (p. 140) under that heading. Should the reader require further information on the subject he must refer to the Key (p. 407), where he will find

INSECTS, ECONOMIC.
Insects, injurious to plants.

(Single insects.)
Colorado beetle. See also Potato Plant (Insect pests).

The headings, therefore, " Insects, injurious to plants,” and “ Potato Plant (Insect pests),” are those which should next be consulted.

588 and 12 Wt 20908 8/05 D & S 2 19871

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In placing a work under a given heading the contents of the work have been regarded in preference to the language of the title page, which is often misleading. These lists, therefore, should be used strictly as subject guides and not for the purpose of tracing a work by its title. A searcher who wishes to find a work by a given writer or similar information should consult the general catalogue of the Library.

Under the headings the entries are arranged in chronological order—the date being usually that of the imprint. This mode of arrangement will be found of material assistance to searchers for novelty and in the investigation of matters of historical interest. It will also enable the reader to select at once the latest work on a particular subject, or to confine his search within limits of date.

To find the place of a given work upon the Library shelves, the number in parentheses at the end of the entry in these Lists should be noted and the Library press book consulted, where, against the same number, the shelf mark is given. For general purposes, the type-written guide to the shelf classification, which will be found at the central desk in the Library, will suffice to lead a . searcher to a particular group of works. The Periodicals, which in these Lists are arranged in strict order of date, are on the shelves further divided into three series, the octavo, quarto and folio. A description of the system of filing and classifying the Periodical Publications will be found in the Class List and Index of the Periodical Publications in the Patent Office Library (Library Series No. 8).

The present list comprises 2,434 works (348 serials, 2,086 textbooks, etc.), representing some 6,533 volumes. The Catalogue entries relating to these works number 4,147 and are distributed under 749 headings and subheadings.

C. N. DALTON,

Comptroller-General.

August, 1905.

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