Show the Engi engineers jeers eyes the importance bf t the eyesight test Is understood in it i general way but few people tax laid on the eyes eyesight lOit of an engine driver during a long run it tales tales years for a driver to learn all tile the signals on a complicated estem ys tem and he must be able to pick tout fout his own at a glance in the amnie of a great junction on the N northwestern rth western railway alone more than I 1 M signals tire are lit every night anil and a river working from london to arc cree e finvid nikl back is controlled by nearly 00 cia signals london Chron lle lete |