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Ophthalmic lenses and accessories; lenses, frames, magnifiers and readers .. (1916)

Bausch & Lomb Optical Company · Rochester, N.Y. : Bausch & Lomb Optical Co. · leaf 38

An illustration from Ophthalmic lenses and accessories; lenses, frames, magnifiers and readers .., 1916, leaf 38 — Smoke A Smoke B n |—100%— 90 100%90 y - 80 80 y — 70 70 - 60 - 50 6050 — 40 40 1 — 30 — 20 3020 _ 10 10 s MOK E C … Smoke D Y G B V

Lenses · Eyeglasses

Internet Archive · California Digital Library · Public Domain Mark 1.0. Free to use for anything.

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