THE SEGMENTAL CUTTING FRAME IS ALMOST CERTAINLY BY J.H.EVANS AS HE WAS THE ONLY KNOWN MAKER OF THIS APPARATUS. IT WAS INTENDED FOR LATHES NOT FURNISHED WITH THE REGULAR SEGMENT ENGINE IN THE HEADSTOCK AND FOR USE FROM THE SLIDE REST AGAINST THE SIDES OF SQUARED WORK. SEE 'ENGLISH MECHANIC' VOL 73 IN WHICH EVANS GIVES A FULL DESCRIPTION OF THE MAKING AND USE. THIS EXAMPLE APPEARS TO UNUSED