On the efficiency and duration of incandescent electric lamps.
Subtitle: Report of a special committee, appointed by the president of the Franklin institute.
Publisher: The Franklin institute
Published: 1885
Place of publication: Philadelphia
Language: eng
Number of pages: 127
Subjects: Incandescent lamps -- Testing.
Notes: "Issued by authority of the Board of managers and published as a supplement to the Journal of the Franklin institute, September, 1885."