Canadian Jewellers Association · Toronto : Maclean-Hunter Pub. Co · leaf 167
of imperfect vision, but thereveals the true condition and makes it easy and quick to select the correct lens. The only Optometer made confining the whole within itself, as the instrument renders rays oflight parallel within the length of the tube, thus making the twenty feet usually used for test… … -4 Jebb Optometer
Jewelry · Jewelry trade
Internet Archive · Thomas Fisher Rare Book Library · Public Domain Mark 1.0. Free to use for anything.
