Ivory Gothic Clock Tower-
the Rectilinear Chuck

The Clock Tower..., a work in ivory eighteen inches high to the ridge of the roof and twenty-one inches high to the points of the spires, every portion untouched from its construction in the lathe, was designed by the author as a test of the capabilities of the rectilinear chuck. This latter was employed alone for the production of every piece in this specimen, except for the gable roof and the ornamental trellise that surmounts its ridge, the former of these had the spherical and the latter the oval chuck used in combination with the rectilinear;....Most of the work was shaped with the eccentric cutting frame, but the elliptical and rose cutting frames were also employed for two special purposes.