His invention consisted in the perfect distribution of the ink, by giving end motion to the rollers, so as to get a distribution crossways, as well as lengthways.

This principle is at the very foundation of good printing, and has been adopted in every machine since made.

The very first experiment proved that the principle was right.

Mr.Cowper was asked by Mr.Walter to alter Koenig's machine at The Times office, so as to obtain good distribution.

He adopted two of Nicholson's single cylinders and flat formes of type.