PHILOSOPHICAL AND MISCELLANEOUS INSTRUMENTS
A lacquered-brass spectroscope,
细节
A lacquered-brass spectroscope,
by John Browning 146 Strand London, the adjustable-lower telescope with slit, the upper telescope with draw-tube adjustment, two end caps and prism with mounting, in plush-lined leather-covered case 4in. (10.2cm.) wide
by John Browning 146 Strand London, the adjustable-lower telescope with slit, the upper telescope with draw-tube adjustment, two end caps and prism with mounting, in plush-lined leather-covered case 4in. (10.2cm.) wide