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NESTLER Model 14 ( 25 cm Scales )
Albert Nestler, Lahr in Baden / Germany (1912)
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VERSION (B)
S C A L E S of the N E S T L E R » RIETZ « Model 14/1
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Front Side [ inverse / RED ] Back Side
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( 0 ... 28 cm Ruler )
A X2
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B X2 S sin(0.01X); sin(0.1X)
[CI] [1/X] L lgX
C X T tan(0.1X)
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D X
( 0 ... 29 cm Ruler )
R E M A R K S : ( 1° = 60' ; 1' = 60" )
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The TRIGONOMETRIC SCALES are divided in MINUTES(') & SECONDS(")
S keyed to A/B ; T keyed to C/D
This historic wooden » Model 14 « has a reciprocal scale 1/X.
On its back side is a table with physical constants. It came in a
black cardboard case: The "/1" on the CASE refers to 1 HAIRLINE
on the cursor.
There is a VERSION (A) in the collection:
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This slide rule is smaller & shorter, has NO "Extended Scales",
and has NO 1/X SCALE - but it came with a 3 HAIRLINE CURSOR in
a black cardboard case.
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