Note 21 — Chapter IX

Note 21. Page 312.

For a really short-sighted person a concave glass, and for a too long-sighted man a convex glass, is requisite: but simpletons who wear a glass for mere appearance' sake, have one through which they can really see—i. e. a piece of common window-glass. Three-fourths of the young men about town wear the last kind of glass.