spectacle-lens

On the center table was a Sears-Roebuck mail-order catalogue, a silver frame with photographs of the Baptist Church and of an elderly clergyman, and an aluminum tray containing a rattlesnake's rattle and a broken spectacle-lens.

Main Street 1920

On the center table was a Sears-Roebuck mail-order catalogue, a silver frame with photographs of the Baptist Church and of an elderly clergyman, and an aluminum tray containing a rattlesnake's rattle and a broken spectacle-lens.

Main Street Sinclair Lewis 1918

If the spectacle-lens be of flint-glass and doubly convex, each of its faces should have a curvature of not greater than 6 1/2 tenths of an inch, nor more than 8 1/2 tenths of an inch in radius: within these limits, it is practicable to obtain perfectly distinct vision under water by pressing the spectacles forwards or backwards to a moderate degree.

The Art of Travel Shifts and Contrivances Available in Wild Countries Francis Galton 1866

The result is as follows: -- experience has shown the distance from the eyeball at which spectacle-glasses can be most conveniently placed; now at that distance, the joint effect of the concave water-lens and the convex glass spectacle-lens, is to produce an opera-glass of exceedingly low magnifying power, that requires a small adjustment for accurate definition at different distances.

The Art of Travel Shifts and Contrivances Available in Wild Countries Francis Galton 1866

Baptist Church and of an elderly clergyman, and an aluminum tray containing a rattlesnake’s rattle and a broken spectacle-lens.

Main Street 2004