Illuminating Engineering Society, Association of Public Lighting Engineers (Great Britain) · [London] · leaf 91
phed bj dayliglit, multipliedby the time of exposure in minutes,found by an accurately graded the portions rej^resenting certain ofthe colours used, (again determined bytests made with the lumeter in amanner approved l)y Mi-. l)o\\) ispractically iniiform. The plates Mere developed Ijy finicand in…
Lighting
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