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Albert Nestler No. 21 "Darmstadt" 25 cm, Linear slide rule
Major collection: Science & Technology
Named collection: Keuffel & Esser Company Collection
Object type: slide rule
Maker: Albert Nestler
Materials: wood; metal; celluloid
Measurements: 1/4 in x 11 1/2 in x 1 1/2 in
2004.010.0594
Named collection: Keuffel & Esser Company Collection
Object type: slide rule
Maker: Albert Nestler
Materials: wood; metal; celluloid
Measurements: 1/4 in x 11 1/2 in x 1 1/2 in
This appears to be a production Albert Nestler No. 21 "Darmstadt" linear slide rule. Gauge Marks: C: rho"(2063), rho'(3438), rho''(6366), D: rho"(2063), Pi, rho''(6366), CI: Pi, A/B: Pi Cursor: Metal Frame, Glass and Plastic with 3 hairlines(2 red and 1 black), hairlined for top and bottom edges. Reverse Slide is keyed to the C Scale. Reverse Label: Conversion factors and LL instructions. Condition: Typical
2004.010.0594
Keuffel & Esser Company Slide Rule Collection Donated by InteliCoat Technologies