|
Date: |
|
Description: | brass folding rule 3 inches wide with many scales by Thomas Heath. Folds to 1 foot around ornate hinge. Outer scale in 1/10th inch to 24 inches. On front side, sloping scales of sine and tangent; on reverse, scales of chord, linear and secant and short scales marked 'Hours' (with roman numerals to VI), 'Chords', 'Lat(itude)' and 'In Mer.' Brass sheet extending from one innner side fits into other side to give rigidity when folded. | License: | http://www.abdn.ac.uk/historic/Copyright_terms_conditions.shtml | Publisher: | ABDNP University of Aberdeen, Natural Philosophy Collection of Historical Scientific Instruments | Rights holder: | 47718 | Temporal: | 1730-1745 | Source: | University of Aberdeen | Creator: | Thomas Heath | Identifier: | http://calms.abdn.ac.uk/Geology/dserve.e... | Go to resource |
|
More Like this...
-
-
Sector
* WELLINGTON . LONDON *…
-
-
-
-
-
-
-
-
|