Drilling by Ear
Photograph
Drilling by Ear
ca. 1975
Gelatin silver print
Image: 11 7/8 × 9 7/8 in. (30.2 × 25.1 cm)
Gift of Jonathan Levine, 2024
2024.0041.0080
Inscriptions Typed in black ink on paper taped to verso and folded to recto BC: DRILLING BY EAR -- Charles Keith adjusts high speed, diamond-coated drill that is \ used to cut holes the diameter of 10 human hairs in hard engineering materials such \ as ceramics and carbides at Batelle Laboratories in Columbus, Ohio. The drill, which \ operates at speeds up to 40,000 revolutions per minute, is so delicately balanced the \ operator cannot feel when it touches the surface on which he is working. a microphone \ attached to the workpiece enables the operator to hear by headphones when the drill \ makes contact. \ -0- \ From: John A. DeMilia \ Carl Byoir & Associates, Inc. \ 380 Madison Avenue (212) 986-6100 \ New York, New York 10017 \ For: COLUMBUS \ Slug: DRILLING BY EAR \ Neg. No.: CCC 1-R5-72 and CCC 1-R6-84 \ 3
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Printed on verso OA: THIS PAPER \ MANUFACTURED \ BY KODAK
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Printed on verso OA: THIS PAPER \ MANUFACTURED \ BY KODAK
