_=Outer Form.=_ _=Inner Form.=_] [Illustration: A Sheet of Twelves, with Two Signatures. _=Outer Form.=_ _=Inner Form.=_] [Illustration: A Common Half-Sheet of Twelves.] [Illustration: Half-Sheet of Twelves, without cutting.] [Illustration: Different Methods of Imposing Half-Sheets of Twelves, from the Centre.] [Illustration: A Sheet of Twelves, Imposed from the Centre.] [Illustration: Outer Form of a Sheet of Long Twelves.] [Illustration: One-third, or 8 pages, of a Sheet of Twelves. To be imposed as a slip, or in the off-cross. _=Outer Form.=_] [Illustration: Inner Form of a Sheet of Long Twelves.] [Illustration: One-third, or 8 pages, of a Sheet of Twelves. To be imposed as a slip, or in the off-cross. _=Inner Form.=_] [Illustration: Two Half-Sheets of Twelves, worked together. _=Outer Form.=_ _=Inner Form.=_] [Illustration: Half-Sheet of Twelves, with 2 Signatures. 4 pages of other matter.] [Illustration: A Half-Sheet of Sixteens.] [Illustration: A Sheet of Sixteens, with One Signature. _=Outer Form.=_ _=Inner Form.=_] [Illustration: A Half-Sheet of Eighteens. Containing 16 pages. The white paper of this half-sheet being worked off, the centre pages must be transposed,—viz. pages 7 and 10 in the room of 9 and 8, and pages 9 and 8 in the place of 7 and 10: when this is done, your imposition will be true.] [Illustration: A Half-Sheet of Eighteens. When the white paper is worked off, transpose the form,—viz. pages 11 and 8 in the room of 7 and 12, and pages 7 and 12 in the place of 11 and 8: this being done, the sheet will then fold up right.] [Illustration: Outer Form of a Sheet of Eighteens, to be folded together.] [Illustration: Outer Form of a Sheet of Eighteens, with One Signature.] [Illustration: Inner Form of a Sheet of Eighteens, to be folded together.] [Illustration: Inner Form of a Sheet of Eighteens, with One Signature.] [Illustration: Outer Form of a Sheet of Eighteens, with Two Signatures.] [Illustration: Outer Form of a Sheet of Eighteens, with Three Signatures.] [Illustration: Inner Form of a Sheet of Eighteens, with Two Signatures.] [Illustration: Inner Form of a Sheet of Eighteens, with Three Signatures.] [Illustration: A Half-Sheet of Eighteens, without Transposition. This mode of imposition is very objectionable, as there will be, when the paper is cut up, three single leaves.] [Illustration: A Half-Sheet of Twenties, with Two Signatures.] [Illustration: Inner Form of a Sheet of Twenties.] [Illustration: Outer Form of a Sheet of Twenties.] [Illustration: A Half-Sheet of Twenty-Fours.] [Illustration: Outer Form of a Sheet of Twenty-Fours, with Two Signatures.] [Illustration: A Half-Sheet of Twenty-Fours, the Sixteen-way.] [Illustration: Inner Form of a Sheet of Twenty-Fours, with Two Signatures.] [Illustration: A Half-Sheet of Twenty-Fours, without Inset.]