D.C. Amplifier
Inventory NumberRS1222
ClassificationAmplifier
Maker
Emory Leon Chaffee
1885 - 1975
Dimensions28.5 x 39 x 19 cm, 21 lb. (11 1/4 x 15 3/8 x 7 1/2 in., 9.5 kg)
DescriptionUsed by E.L. Chaffee and assistants, 1921-1930, Experiments ont he response of the retina of the eye, On shelf with sign: "Prof. E. L. Chaffee's "Eye Experiment" apparatus, 1920"
Signedon face of the left meter: PAT. NOV. 6, '88 APR. 29, '90 FEB. 17, '91OCT. 4, '98 JULY 16, '01/ WESTON / MILLIAMMETER / WESTON ELECTRICAL INSTRUMENT CORP., NEWARK, N.J., U.S.A. / MODEL 301 NO. 279547
on face of the right meter: PAT. NOV. 6, '88 APR. 29, '90 FEB. 17, '91OCT. 4, '98 JULY 16, '01/ WESTON / MILLIAMMETER / WESTON ELECTRICAL INSTRUMENT CORP., NEWARK, N.J., U.S.A. / MODEL 301 NO. 440319
Historical AttributesUsed by E.L. Chaffee and assistants, 1921-1930, Experiments ont he response of the retina of the eye, On shelf with sign: "Prof. E. L. Chaffee's "Eye Experiment" apparatus, 1920"
Emory Leon Chaffee
Date: circa 1930
Accessories: green canvas-covered wood box with a brass snap enclosure
Object number: RS1468
Emory Leon Chaffee
Date: circa 1910
Object number: RS1190
Emory Leon Chaffee
Date: 1910
Object number: RS1189
Emory Leon Chaffee
Date: circa 1910
Accessories: Separate baffle, cylindrical with flared edge.
Object number: RS1230
Emory Leon Chaffee
Accessories: Cylindrical vacuum tube.
Object number: RS1250
