Registering.—153. By this term is understood the adjustment of an already printed sheet to the stone, in such a manner that the further work about to be printed on it shall coincide with the spaces intended for it.

This is one of the most important matters that can engage the attention of the chromolithographer, for it is quite clear that all the care of the artist, having this end in view, will be thrown away if the printer fails to make the colours fall into their proper places.

There are several methods more or less adapted to obtaining this important object, but it must be observed that in each case, the key-stone must have applied to it appropriate marks adapted to facilitate the subsequent operations, and that this preparation varies somewhat in each method. To facilitate reference, we will number these methods, commencing with the simplest:—

I. By Lay.—This, in many hands, is a very effectual means of obtaining register, and is the simplest possible; but the size of the paper to be used should be determined before the set-off is made. It is true that this is not absolutely essential to the method, but it greatly facilitates it in every way. The size of the paper having been fixed upon, a “lay,” corresponding to the edge of the paper, is made on the stone, by which the subject is brought into proper position upon the sheet, and this lay is then drawn with fine lines in lithographic ink in such manner as to print upon the sets-off and to remain all through the printing.