Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Apparatus developed in Mining Research Laboratory; practical tests underground have shown it to be convenient for obtaining rapid results; with accuracy within about 10%; principle is based upon brightness of series of holes at varying distances from source of illumination, and matching illumination under test with one of holes. (See also - n 3720 Apr 15 1932 p 740; Instn Min Engrs -- Trans v 83 Part 2 p 239-44; Iron and Coal Trades Rev v 124 n 3347 and 3356 Apr 22 1932 p 670-1 and June 24 p 1039)
Apparatus developed in Mining Research Laboratory; practical tests underground have shown it to be convenient for obtaining rapid results; with accuracy within about 10%; principle is based upon brightness of series of holes at varying distances from source of illumination, and matching illumination under test with one of holes. (See also - n 3720 Apr 15 1932 p 740; Instn Min Engrs -- Trans v 83 Part 2 p 239-44; Iron and Coal Trades Rev v 124 n 3347 and 3356 Apr 22 1932 p 670-1 and June 24 p 1039)
Photometer for use in mines
Colliery Guardian
Graham, J.I. (Autor:in)
Colliery Guardian ; 144
1932
2 pages
Aufsatz (Zeitschrift)
Englisch
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