JOHN BROWNING, LATE-19TH CENTURY
Details
A LACQUERED BRASS SPECTROSCOPE
JOHN BROWNING, LATE-19TH CENTURY
signed John Browning 68 Strand London, rack and pinion adjustment, the two prisms raised on three brass columns from the horizontal circle with 0°-140° scale, magnifier vernier and tangent screw adjustment and clamp for the collimeter, raised on a brass column from a splayed tripod foot, with spare eyepiece and prisms, in a mahogany case with sample drawer.
17½in. (44.5cm.) high in case
JOHN BROWNING, LATE-19TH CENTURY
signed John Browning 68 Strand London, rack and pinion adjustment, the two prisms raised on three brass columns from the horizontal circle with 0°-140° scale, magnifier vernier and tangent screw adjustment and clamp for the collimeter, raised on a brass column from a splayed tripod foot, with spare eyepiece and prisms, in a mahogany case with sample drawer.
17½in. (44.5cm.) high in case
Special notice
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