Table of contents
April 25, 1885, Volume 52 No 17 pp255-270
About the coverNotes and Queries
Index
Patent Notes
Top of page
Top of pageArticles
An Electrical Standard for Measuring Light - pp261 - 262
doi:10.1038/scientificamerican04251885-261
Dr. Ochorowicz's Loud-Speaking Telephone - p263
doi:10.1038/scientificamerican04251885-263a