Table of contents
March 30, 1889, Volume 60 No 13 pp191-206
About the coverBusiness and Personal
Notes and Queries
Index
Patent Notes
Top of page
Top of pageArticles
The Metropolitan Telephone Co.'s New Central Station and Great Switchboard - p191
doi:10.1038/scientificamerican03301889-191
Position of the Planets in April - pp192 - 193
doi:10.1038/scientificamerican03301889-192c
An Insulator for Electrical Conductors - p195
doi:10.1038/scientificamerican03301889-195b
