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NORTH INDIA, CIRCA 1880
細節
A SANSKRIT ASTROLABE
NORTH INDIA, CIRCA 1880
1ith five plates engraved on both sides with stereographic projections, one with four quadrants of prayer times, the rete with pointers for 26 named stars, the mater rim engraved and numbered for 360° in 60 divided by 6°, the reverse with double shadow square and alidade with sighting tube, engraved zodiac incsription to top right quadrant and shadow square.
7½in. (19cm.) long
NORTH INDIA, CIRCA 1880
1ith five plates engraved on both sides with stereographic projections, one with four quadrants of prayer times, the rete with pointers for 26 named stars, the mater rim engraved and numbered for 360° in 60 divided by 6°, the reverse with double shadow square and alidade with sighting tube, engraved zodiac incsription to top right quadrant and shadow square.
7½in. (19cm.) long