.

Large books.
keep better if they are laid on their sides; when they stand, the weight of the leaves is a pull on the binding which tends to draw the books out of shape, and sometimes breaks them.

Books which stand up should never be permitted to lean over, but should be kept always perfectly erect; the leaning wrenches them out of shape, and soon breaks the binding.

A row of books which does not comfortably fill a shelf should be kept up at one end by a book support.

There are several good supports on the market.