A.W.Faber-Castell, Stein bei Nuernberg / Germany (1967) ***************************************************************** SCALES of the FABER-CASTELL POCKET - R I E T Z Model 67/87Rb ================================================================= ( 0 ... 14 cm Ruler ) [ inverse / RED ] ( one-sided only ) L lgX K X^{3} A X^{2} ----------------------------------------------------------------- B X^{2} [CI] [1/X] C X ----------------------------------------------------------------- D X S sin(0.1X) ST arc(0.01X) T tan(0.1X) R E M A R K S : ( 1° = 60' ; 1' = 60" ) ================================================================= The TRIGONOMETRIC SCALES are divided in MINUTES & SECONDS The SR came in a green leather case ( w.zipper ). The STYLUS, to operate the build-in ADDIATOR on its back side, was missing and had to be HOME-MADE. This ADDIATOR is able to show t r u e negative results in its lower window. On the upper end of the ADDIATOR are mathematical constants and formulas and on its lower end are US/Metric conversions printed. Historical Remarks ... Ref. to the print on the case, this Pocket Slide Rule was a gift from »BRAAS«, a well known company for making roof tiles. impressum: Production Code = 11_67 = Nov.1967 ***************************************************************** © C.HAMANN http://public.beuth-hochschule.de/~hamann 06/13/11 |