Abstract :
“Tests of Tungsten Lamps,” by T. H. Amrine and A. Guell, issued as Bulletin No. 33 of the Engineering Experiment Station of the University of Illinois, presents the results of tests upon tungsten lamps of the 25-watt size. Of the three kinds of lamps tested, one kind was of American manufacture, with filaments made by the paste process, the other two kinds were of German manufacture, with filaments made by the colloid and deposition processes. Each type of lamp had a different scheme of filament mounting.
