ted in London may be
corrected by Authors residing at any distance, the Proof Sheets passing
and re-passing through the Post Office at Single Postage, provided they
are not cut, and that the direction is Written _upon_ the Sheet. An
Envelope would occasion Double Postage. It is usual also to add the
words "Proof Sheet" in the corner.

The various kinds of

ILLUSTRATIVE ENGRAVINGS

have already been slightly referred to. They are of three kinds:
Engravings on Steel,[50-*] or Copper; Lithographic Drawings, or Prints
from Stone; and Engravings on Wood. The first two are Printed
independently of the Work; the latter in connection with it; either
incorporated with the Text, or otherwise, as may be desired. Each of
these modes may be employed with advantage, where Embellishment is
intended, or information beyond that which description is adapted to
convey. Coloured Engravings are also frequently employed in such cases.

Next to the Printing a Work, is the

CHOICE OF BINDING.

Until a very recent period, Binding was of two kinds only--that in Paper
and that in Leather. The former, called Boarding, being used for Books
when first Published, or when purchased for use in that state; the
latter for Books when read, or intended to form a permanent part of a
Library. Binding in Leather has been carried to very great perfection;
and, according to the skill employed, is susceptible of the most varied
and tasteful embellishment. The Titles of Books in Boards are affixed by
printed Labels--those of such as are bound in Leather in Letters worked
in Gold. These latter are produced by laying a leaf of Gold on the
Leather, and stamping each Letter singly, a process requiring great
skill and labour.

Recently a new mode has been introduced, called Cloth Binding. This is
done by covering the Book with Cloth; and, by means of a strong
pressure, Stamping it with some Ornamental Device Engraved for the
purpose, and which is called Embossing. There is in this new method also
another improvement--that of Lettering the back in Gold at one
operation, which is thus effected:--instead of the mode employed in
Leather Binding, of impressing each Letter singly on the Gold, the whole
of the Lettering is cut on a solid piece of brass, and in this form
impressed on the back at once. This is not only a great saving in time
and labour, but admits also of much tasteful ornament in emblematical
and other fanciful devices, which produce a very pleas