fluorescent screen for Hilger spectrograph
Datecirca 1930
Inventory Number2005-1-0013a
ClassificationPhotographic Plate Holder
Subject
Maker
Adam Hilger Ltd.
1874 - 1948
Cultural Region
Place of Origin
Dimensions14.7 × 15.9 × 0.8 cm (5 13/16 × 6 1/4 × 5/16 in.)
Material
DescriptionSmall, square wood fluorescent screen (green) for use with an Adam Hilger spectrographic camera. According to the 1928 trade catalogue, in which this E68 model is found, this screen was used to replace the dark slide for visual observations of the ultraviolet spectrum. A scale of wavelengths is provided and a small patch of diffusing medium on which the position of the various parts of the visible spectrum can be seen as a prolongation of the fluorescent ultraviolet spectrum. Original price: 5 pounds (May 1932)
Signedon front: ADAM HILGER Ltd. LONDON, / MADE IN ENGLAND
Inscribedon front, under signature: No E.68.301/32206
Adam Hilger Ltd.
Date: circa 1928
Accessories: 3 discoidal feet.
Object number: RS1081
Adam Hilger Ltd.
Date: 1924-1930
Accessories: Photographic plate holder
Object number: 2005-1-0012a,b
Adam Hilger Ltd.
Date: 1924-1928
Object number: 2005-1-0019
Harvard University
Date: late 19th-early 20th Century
Object number: 1998-1-1692
