■ƒ SOLAR CONSTRUCTION FRAME FROM
NICHOLAS BION BRASS, circa 1700
signed on the square plate N Bion A Paris, scale
of degrees 90° -0° -90° divided by 1°, upper edge
inscribed ' cote applique AU MUR ', the horizontal
dial rotating at 4 o'clock for 40°,
45°, 50° and 55° latitude, marked with
Roman and Arabic numerals for 4-12-8, bird-shaped
gnomon, graduated, with an eight-point
compass rose. 12.7 x 12.7cm.
BRASS SUNDIAL CONSTRUCTION, NICHOLAS
BION, CIRCA 1700
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