S C A L E S of the R I E T Z » Made in USA « (1960) =========================================================== Front Side Back Side =========================================================== A X^{2} ----------------------------------------------------------- B X^{2} S sin(0.01X); sin(0.1X) CI 1/X L lgX C X T tan(0.1X) ----------------------------------------------------------- D X R E M A R K S : ( 1° = 60' ; 1' = 60" ) =========================================================== The TRIGONOMETRIC SCALES are in MINUTES(') & SECONDS(") S keyed to A/B ; T keyed to C/D To use the Back-Scales, the slider has to be turned. The slide rule is made of mahogany with scales on celluloid veneer. On the back are conversion tables and constants - given as fractions ??? - same as (eg.) K&E 4056 - ??? It came in a black artificial leather case with no cursor. The cursor is replaced with an unknown frame. The window is made of PVC from a CD case. The hairline is made with a »X-ACTO« and colored with a marker. Because the slider was loose, a cardboard strip is glued on top of the metal body. impressum: *********************************************************** http://public.beuth-hochschule.de/~hamann 09/10/09 |