their books with paper or thin muslin covers, before they are placed on the shelves for use. This method has its advantages and its drawbacks. It doubtless protects the bindings from soiling, and where books circulate widely and long, no one who has seen how foul with dirt they become, can doubt the expediency of at least trying the experiment of clean covers. They should be of the firmest thin but tough Manila paper, and it is claimed that twenty renewals of clean paper covers actually cost less than one re-binding. On the other hand, it is not to be denied that books thus covered look shabby, monotonous, and uninteresting. In the library used for reference and reading only, without circulation, covers are quite out of place.

Book-plates having been briefly referred to above, a few words as to their styles and uses may here be pertinent. The name "book-plate" is a clumsy and misleading title, suggesting to the uninitiated the illustrations or plates which embellish the text of a book. The name Ex libris, two latin words used for book-plate in all European languages, is clearer, but still not exact, as a definition of the thing, signifying simply "out of books." A book-plate is the owner's or the library's distinctive mark of ownership, pasted upon the inside cover, whether it be a simple namelabel, or an elaborately engraved heraldic or pictorial device. The earliest known book-plates date back to the fifteenth century, and are of German origin, though English plates are known as early as 1700. In France, specimens appear for the first time between 1600 and 1650.

Foreign book-plates are, as a rule, heraldic in design, as are also the early American plates, representing the coat of arms or family crest of the owner of the books, with a motto of some kind. The fashion of collecting these owners' marks, as such, irrespective of the books containing them, is a recent and very possibly a passing mania. Still,

there is something of interest in early American plates, and in those used by distinguished men, aside from the collector's fad. Some of the first American engravers showed their skill in these designs, and a signed and dated plate engraved by Nathaniel Hurd, for example, of Boston, is of some historic value as an example of early American art. He engraved many plates about the middle of the last century, and died in 1777. Paul Revere, who was an engraver, designed and executed some few plates, which are rare, and highly prized, more for his name than for his skill, for, as generally known, he was a noted patriot of the Revolutionary period, belonging by his acts to the heroic age of American history.

A book of George Washington's containing his bookplate has an added interest, though the plate itself is an armorial design, not at all well executed. Its motto is "exitus acta probat”—the event justifies the deed. From its rarity and the high price it commands, it has probably been the only American book-plate ever counterfeited. At an auction sale of books in Washington in 1863, this counterfeit plate had been placed in many books to give a fictitious value, but the fraud was discovered and announced by the present writer, just before the books were sold. Yet the sale was attended by many attracted to bid upon books said to have been owned by Washington, and among them the late Dr. W. F. Poole, then librarian of the Boston Athenaeum, which possesses most of the library authentically known to have been at Mount Vernon.

John Adams and John Quincy Adams used book-plates, and James Monroe and John Tyler each had a plain namelabel. These are all of our presidents known to have used them, except General Carfield, who had a printed bookplate of simple design, with the motto "inter folia fructus." Eleven of the signers of the Declaration of Independence

are known to have had these signs of gentle birth-for in the early years of the American Colonies, it was only the families of aristocratic connection and scholarly tastes who indulged in what may be termed a superfluous luxury.

The plates used among the Southern settlers were generally ordered from England, and not at all American. The Northern plates were more frequently of native design and execution, and therefore of much greater value and interest, though far inferior in style of workmanship and elaboration of ornament to the best European ones.

The ordinary library label is also a book-plate, and some of the early libraries and small collections have elaborate designs. The early Harvard College library plate was a large and fine piece of engraving by Hurd. The Harvard. Library had some few of this fine engraved label printed in red ink, and placed in the rarer books of the libraryas a reminder that the works containing the rubricated book-plates were not to be drawn out by students.

The learned bibliophile and librarian of Florence, Magliabecchi, who died in 1714, devised for his library of thirty thousand volumes, which he bequeathed to the Grand Duke of Tuscany, a book-plate representing his own profile on a medal surrounded with books and oak boughs, with the inscription-"Antonius Magliabecchius Florentinus."

Some book-plates embody designs of great beauty. The late George Bancroft's, engraved on copper, represented a winged cherub (from Raphael) gazing sun-ward, holding a tablet with the inscription "Eis phaos," toward the light.

Some French book-plates aim at humor or caricature. One familiar example represents an old book-worm mounted on a tall ladder in a library, profoundly absorbed in reading, and utterly unconscious that the room beneath. him is on fire.

To those who ask of what possible utility it can be to cultivate so unfruitful a pursuit as the devising or the collecting of book-plates, it may be pertinent to state the claim made in behalf of the amateurs of this art, by a connoisseur, namely, "Book-plates foster the study of art, history, genealogy, and human character." On this theory, we may add, the coat of arms or family crest teaches heraldry; the mottoes or inscriptions chosen cultivate the taste for language and sententious literature; the engraving appeals to the sense of the artistic; the names of early or ancient families who are often thus commemorated teach biography, history, or genealogy; while the great variety of sentiments selected for the plates illustrate the character and taste of those selecting them.

On the other hand, it must be said that the coat of arms fails to indicate individual taste or genius, and might better be supplanted by original and characteristic designs, especially such as relate to books, libraries, and learning.

CHAPTER 5.

THE ENEMIES OF BOOKS.

We have seen in former chapters how the books of a library are acquired, how they are prepared for the shelves, or for use, and how they are or should be bound. Let us now consider the important questions which involve the care, the protection, and the preservation of the books.

Every librarian or book owner should be something more than a custodian of the books in his collection. He should also exercise perpetual vigilance with regard to their safety and condition. The books of every library are beset by dangers and by enemies. Some of these are open and palpable; others are secret, illusive, little suspected, and liable to come unlooked for and without warning. Some of these enemies are impersonal and immaterial, but none the less deadly; others are personally human in form, but most inhuman in their careless and brutal treatment of books. How far and how fatally the books of many libraries have been injured by these ever active and persistent enemies can never be adequately told. But we may point out what the several dangers are which beset them, and how far the watchful care of the librarian and his assistants may forestall or prevent them.

One of the foremost of the inanimate enemies of books is dust. In some libraries the atmosphere is dust-laden, to a degree which seems incredible until you witness its results in the deposits upon books, which soil your fingers, and contaminate the air you breathe, as you brush or blow it away. Peculiarly liable to dust are library rooms located in populous towns, or in business streets, and built close to