Assertion: sextant's scale | /r/HasProperty | divided on vertical edge of the crab claw
Facets:
Source sentences:
text: Three very important revolutionary and transitional features are: A flat brass index arm instead of wood, an early form of vernier scale divided on the vertical edge of the crab claw marked "Minutes," and a solid brass diagonally divided scale with a second vertical scale below, all riveted over a boxwood arc!