Mark books freely, to assure their being recognized as the library's property wherever seen.
Have some definite pages on which stamps always appear.

Many use the title-page, fifty-first or one hundred and first, and the last page.
This need not interfere with marking elsewhere.
[Illustration: Embossing stamp.] On the back of the book write the call-number.

For this purpose use a tag or label.

They can be had in several sizes; round ones are best.
Paste the label where it will mar the book least, as near the middle as possible.

It is well to put all labels at the same height from the bottom of the back, so far as this can be done without covering essential parts of the lettering.