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EEL Lightmaster Photometer serial no. 18-3486 (a light meter)

EEL Lightmaster Photometer serial no. 18-3486 (a light meter)

1960-1969 (estimated)
"Lightometer" light meter model E703

"Lightometer" light meter model E703

1950-1960
Printing Cylinder from a Xerox Machine, 1978

Printing Cylinder from a Xerox Machine, 1978

1978
Four selenium low power rectifiers

Four selenium low power rectifiers

1942-1946
Bust of Berzelius in selenium, 1862

Bust of Berzelius in selenium, 1862

1862
Photoectric cell c. 1915 (probably by GEC)

Photoectric cell c. 1915 (probably by GEC)

1910-1920
Glass-stoppered bottle containing selenium

Glass-stoppered bottle containing selenium

1801-1892 (prepared)
Cascade generator for 1.5 million volt accelerator

Cascade generator for 1.5 million volt accelerator

1937
One of four examples of photosensitive (selenium) material in various stages of construction. Fixed to wooden mount.

Example of photosensitive (selenium) material c 1890

1880-1900
'Wound Mica Coated With a Film of Selenium'. One of four examples of photosensitive (selenium) material in various stages of construction. Fixed to wooden mount. Part of apparatus for transmitting pictures by telegraph (phototelegraphy). Designed and constructed by Dr Shelford Bidwell in 1881.

Wound Mica Coated With a Film of Selenium

1880-1900
Model 603 illumination meter, no. A.40195 by Weston Electrical Instrument Co., Surbiton, England, c. 1933.

Model 603 illumination meter by Weston Electrical Instrument Co.

1928-1938
Two selenium high voltage rectifiers: 1945 British 16 H.T.80; 1948 British 36 H.T.40

Two selenium high voltage rectifiers

1945-1948
One of four examples of photosensitive (selenium) material in various stages of construction. Fixed to wooden mount.

Example of photosensitive (selenium) material c 1890

1880-1900
One of four examples of photosensitive (selenium) material in various stages of construction. Fixed to wooden mount.

Example of photosensitive (selenium) material c 1890

1880-1900
One of four examples of photosensitive (selenium) material in various stages of construction. Fixed to wooden mount.

Example of photosensitive (selenium) material c 1890

1880-1900