655[X]ylography
797[Y]achting
313Year books
 616Yellow fever
362Young men's association
295[Z]end
295Zend Avesta
521Zodiac
 590Zoölogy
593Zoöphytes
295Zoroaster

[EXPLANATIONS]

The titles of the subject catalogue are exact transcriptions of the title page, neither amended, translated, or in any way altered, except that mottoes, titles of authors, repetitions, or matter of any kind not essential to a clear titular description, are omitted. Omissions of mottoes are indicated by three stars (* * *); of other matter by three dots (...). The phraseology, spelling, and punctuation of the title are exactly copied; but capitals are given only to proper names and adjectives, and initial words of sentences. Any additions needed to make the title clear are supplied and enclosed by brackets.

After the titles, are given in order: the place of publication; the year; the year of copyright, if different, in brackets; the edition; the number of volumes, or of pages if in only one volume; the illustrations, maps, plates, or portraits; and the size nearest in the arbitrary scale, regardless of the fold of the sheet. This scale gives the heights in decimeters. Square and oblong books have the size prefixed by sq. or ob. Books 1 decimeter high are called 32°; 1.5 deci., 16°; 2 deci., 12°; 2.5 deci., 8°; 3 deci., 4°; and all others are marked simply by the nearest height, i.e. a book marked 4 is between 3.5 and 4.5 decimeters high. In books having more than one pagination the number of pages is indicated by giving the last number of each pagination connected by a +; an added + indicates additional matter unpaged.

These imprint entries give the facts regardless of the title page, and are left blank only when they can be ascertained neither from the book itself or other sources.

The contents of volumes are given when on title pages, or when necessary to properly identify the volume, but no analysis is attempted. Necessary notes are given at the bottom of the subject card after the imprint entries.

Duplicates are simply marked copy 2, copy 3, etc., and bear the same class and book number, but editions of the same book distinct in character are catalogued separately.