An Experimental Investigation of the Positive After-Image in Audition (Classic Reprint) - Couverture souple

Bishop, Homer Guy

 
9781333223618: An Experimental Investigation of the Positive After-Image in Audition (Classic Reprint)

Synopsis

Excerpt from An Experimental Investigation of the Positive After-Image in Audition

We chose the lights as signals because they were silent; but they were not reliable; and we now substituted for them small electro magnets from a player-piano. These magnets are not noisy; and when Operated by a weak current, just strong enough to produce a light, quick movement, they did not annoy the O's. To the armature of the magnet we soldered a strip of tin, 4 cm. By cm., to serve as signal flag. Every 0 had a magnet and flag in his booth before him, at the place where the light had been. When the current was Off, the flag stood almost vertically; when it was turned on, the flag was pulled quickly down to the horizontal.

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Présentation de l'éditeur

Originally published in 1921. This volume from the Cornell University Library's print collections was scanned on an APT BookScan and converted to JPG 2000 format by Kirtas Technologies. All titles scanned cover to cover and pages may include marks notations and other marginalia present in the original volume.

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