American Optical Company

SPENCER Scientific Instruments

SPENCER Scientific Instruments [ with pricelist AND ERRATA ]

1946

The otoscope

The otoscope

1940

Analysis of prismatic effects

Analysis of prismatic effects in bifocal lenses

1939

"Reading" in the classroom

1937

Optical machinery, tools and s

Optical machinery, tools and supplies

1915

Talks with the practical optic

Talks with the practical optician

1914

Illustrated catalogue of spect

Illustrated catalogue of spectacles and eyeglasses, in 8-K, 10-K and 14-K gold, platinum, silver, alumnico, Roman alloy, German silver, filled gold, steel, frameless, etc., etc

1894