Each person in the companionship must lay down his pages properly on the stone for imposition. The compositor whose turn it is to impose looks them over to see if they are rightly placed. Should they, after this examination, lie improperly, and be thus imposed, it will be his business to transpose them; but, should the folios be wrong, and the mistake arise from this cause, it must be rectified by the person to whom the matter belongs. Pages without folios or head-lines, laid down wrongly for imposition, must be rectified by the person who has been slovenly enough to adopt this plan. RULES AND REGULATIONS TO BE OBSERVED IN A PRINTING-OFFICE. Compositors are to receive their cases from the foreman or his assistant, free from all pi or improper sorts, with clean quadrate and space boxes, both Roman and Italic, which they are to return to him in equally good condition. 2. When a compositor receives letter, furniture, &c. from the foreman, he is to return any portion not used, in as good state as he received it, the same day. 3. When a case is taken out of the rack, the compositor is to return it into the proper place immediately after he has done with it. 4. No cases to be placed over others, or under the frames, or on the floor. 5. Compositors are to impose their matter and pull a proof as soon as made up, unless directed otherwise, and to correct the proof without unnecessary delay. 6. The proof, when pulled, to be given to the reader, the copy in regular order to accompany the first proof, and the foul proof the second. 7. Compositors are not to leave either type or furniture on the stone. 8. A compositor is not to detain an imposing-stone longer than the nature of the business may require. 9. Head-lines, or other useful materials, on galleys, used during the course of a work, to be cleared away as soon as the work is finished. 10. When a work is done, the compositor, before beginning another work, unless otherwise directed, is to clear away the forms, taking from them the head-lines, white-lines, and odd sorts, as well as the leads and reglets; which, with the furniture of each sheet, and the matter properly tied up for papering, are to be given to the foreman. 11. Types dropped on the floor to be picked up at once. Matter broken by accident to be cleared away on the same day. 12. The saw, saw-block, bowl, sponge, letter-brush, shears, bellows, &c., to be returned to their respective places as soon as done with. 13. Letter-boards, windows, frames, &c., to be kept free from pi. 14. No person to take sorts from the cases of another without leave, nor hoard useful sorts, not wanting or likely to want them. 15. Compositors employed by the week to work not less than ten hours per day. 16. Unnecessary conversation to be avoided. [Illustration: GALLEY CABINET.] [Illustration] THE PRESS AND ITS WORKING. HISTORY OF THE PRESS. [Illustration: OLD COMMON PRESS.]