Ribs of the printing press . These are two wooden angle-girders held together at their ends by two transverse plates, assembled on site. The press ribs form a long rectangular frame in the hollow interior of which run two bearers which are pieces of wood of the same length spaced equally apart each with fixed a metal rail fixed on its upper surface. The ribs are supported at one end on their own pedestal and in the middle by a moveable support; the [other] end is supported on one of the crosspieces of the rear train of the press where it fits and is held by a bolt or by a wooden bar that passes across it, placed behind the crosspiece between the cheeks. See plates XV, XVI, XVII  [1].

1. The figure references given in the text do not appear to be correct. However, Plates XV, XVI and XVII (follow the links) illustrate the ribs clearly and should be consulted to make sense of the description. Their lettering does not correspond to that in the French text. The original figure references, not translated, are : Voyez Pl. IV. fig. 2. G g qui représente le pié du berceau ; k k m , dont on ne voit que les côtés n k k; m le quatrieme opposé à k k , lui est en tout semblable.