Albert Nestler, Lahr in Baden / Germany (1912) *************************************************************** SCALES of the NESTLER P O C K E T RIETZ » Model 22R « =============================================================== Front Side [ inverse / RED ] Back Side =============================================================== ( 0 ... 16 cm Ruler ) K X3 A X2 --------------------------------------------------------------- B X2 S sin(0.1X) [CI] [1/X] ( 18 ... 34 cm Ruler ) ST arc(0.01X) C X T tan(0.1X) --------------------------------------------------------------- D X L lgX ( 0 ... 18 cm Ruler ) R E M A R K S : ( 1° = 60' ; 1' = 60" ) =============================================================== The TRIGONOMETRIC SCALES are divided in MINUTES & SECONDS This historic SR is made of mahogany with scales on celluloid veneer. Under the slider is a continuous RULER on the body ( 18 ... 34 cm ) On the back side of the slide rule is a table with physical constants. The cursor has 3 hairlines. The slide rule came in a black cardboard case. Historical Remarks ... impressum: *************************************************************** © C.HAMANN http://public.BHT-Berlin.de/hamann 09/24/11 |