uts wood, a locomotive many curve against curve, glass pieces of steel, and a against glass, refraction watch a collection of against refraction, disper- wheels and springs. But sion against dispersion, the house, the locomotive, until one corrected ele- Glasses which are used for. testing an… … ing of the eye of the magic three times — "rough," In the picture on the left the flame dances as the lens is revolved and is stationary in the picture to the right. Observe the untrimmed tube which shows what "second," and "fine" grind- edges in one and the trimmed edges in the other picture. the…
Lens · Machine · Inches · Motor · American supplement · Scientific American · Square foot · Sewing machine · Carbon filament · Electric current · York city · American supplements · Reinforced concrete · Three times
Internet Archive · Public domain (published before 1931). Free to use for anything.
