This is a beautiful contrivance, and was, as I understand, the invention of Andrew Spottiswoode, Esq., who has several of them in action in his extensive establishment. It is moved by steam, and prints two forms at the same time, which pass alternately under the platen, producing at its average rate of working seven hundred impressions of each form in the hour.
The frisket is attached to the tympan at the bottom near the tympan joints, so that when the tympan is lifted from the form by the machinery they open at the upper end, contrary to the usual way in presses worked by manual labour, and the printed sheet is left by the tympan resting on the frisket, where the paper was previously laid on.
I believe this is the first successful application of steam, as a motive power, to printing presses with a platen and a perpendicular pressure. I heard the late Alexander Tilloch, Esq., say that he intended to apply it to the presses with which the Star newspaper was printed, but he never carried it into effect; and Mr. Koenig came to England solely for this purpose; but after some years passed in making experiments, assisted by English capital, he was completely foiled in the attempt, and afterwards worked upon Mr. Nicholson's plan, and produced a machine to print with cylinders. — See Machine.