John Browning, London

Direct Vision Hand Spectroscope c. 1885

John Browning, London. Direct Vision Hand Spectroscope c. 1885

John Browning, London. Direct Vision Hand Spectroscope c. 1885

 

John Browning direct vision spectoscope

 

spectrum observed through the spectroscope

Spectrum of fluorescent light observed through the spectroscope

Information about John Browning (c.1831 1925)

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