Table of contents
Recently Patented Inventions
Business and Personal
Books
Notes and Queries
Index
Patent Notes
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Top of pageArticles
The Electric Subways of the City of New York - p239
doi:10.1038/scientificamerican04201889-239
Permeability of Cements, The Hastings Telescope, and more - pp240 - 241
doi:10.1038/scientificamerican04201889-240
Improved Protector for Dikes or Levees - p243
doi:10.1038/scientificamerican04201889-243d