EUGEN DIETZGEN CO., Chicago, Illinois / USA (1950) ************************************************************ SCALES of the D I E T Z G E N » NATIONAL « Model 1767 ============================================================ ( one-sided only ) K X3 S sin(0.01X); sin(0.1X) A X2 ------------------------------------------------------------ B X2 CI 1/X C X ------------------------------------------------------------ D X T tan(0.1X) L lgX R E M A R K S : ( 1° = 60' ; 1' = 60" ) ============================================================ The TRIGONOMETRIC SCALES are divided in MINUTES & SECONDS S keyed to A ; T keyed to D Historical Remarks ... impressum: ************************************************************ © C.HAMANN http://public.BHT-Berlin.de/hamann 11/23/09 |