Table of contents
Inventions
Business and Personal
Notes and Queries
Books
Index
Patent Notes
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Top of pageArticles
The Chicago Police Telephone and Patrol System - p255
doi:10.1038/scientificamerican04231881-255
A Mechanical Finger for Use in the Photographing of Engravings - p261
doi:10.1038/scientificamerican04231881-261
A Curious Inhabitant of the Sargasso Sea and Its Nest - p263
doi:10.1038/scientificamerican04231881-263