KEUFFEL & ESSER, New York / USA (1961)
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S C A L E S of the » K & E K - 12 Prep « Model 4158
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( one-sided only )
K X3
A X2
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B X2
S sin(0.1X); sin(0.01X)
CI 1/X
T tan(0.1X)
C X
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D X
L lgX
R E M A R K S : ( 1° = 60' ; 1' = 60" )
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The TRIGONOMETRIC SCALES are in MINUTES(') & SECONDS(")
S keyed to B ; T keyed to C
The body is made of green plastic with scales on celluloid
veneer. It came in a green soft plastic case with a booklet
» Learning to Use the Slide Rule - Step-By-Step, Easy ... «
Historical Remarks ...
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© C.HAMANN www.tfh-berlin.de/~hamann impressum 12/12/08
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