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细节
A 19th-Century English lacquered-brass chemical table spectrometer-spectroscope,
signed John Browning 68, Strand, London, the telescope with rack and pinion adjustment, the collimeter with micrometer adjustment to the aperture slit and small comparison prism with oxidised-brass cover, the prism table with two screw clamps and 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 brass handle and key -- 44.4cm. (17½in.) high
signed John Browning 68, Strand, London, the telescope with rack and pinion adjustment, the collimeter with micrometer adjustment to the aperture slit and small comparison prism with oxidised-brass cover, the prism table with two screw clamps and 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 brass handle and key -- 44.4cm. (17½in.) high
注意事项
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