Never lend a book without an acknowledgement. . . Do not allow your books to get damp, as they soon mildew. . . Do not allow books to be very long in a too warm place. . . Do not, in reading, turn down the corners of the leaves; do not wet your finger to turn a leaf. . . Never pull a book from the shelf by the head-band; do not toast them over the fire, or sit on them. . .