Table of contents
July 10, 1869, Volume 21 No 2 pp17-30
About the coverBusiness and Personal
Top of page
Top of pageArticles
New and Improved Form of Simple Microscope - pp20 - 21
doi:10.1038/scientificamerican07101869-20
An Important Question in Sociology—The Intermarriage of Relations - pp22 - 23
doi:10.1038/scientificamerican07101869-22a
Wanted a Substitute for Earth and Plaster Walls - p25
doi:10.1038/scientificamerican07101869-25
The Practical Application of the Slide Valve and Link Motion to Stationary, Portable, Locomotive, and Marine Engines - p26
doi:10.1038/scientificamerican07101869-26a
The Hartford Steam Boiler Inspection and Insurance Company - pp26 - 27
doi:10.1038/scientificamerican07101869-26b
Interference Case—Decision of the Commissioner of Patents - p27
doi:10.1038/scientificamerican07101869-27b
Manufacturing, Mining, and Railroad Items - pp27 - 28
doi:10.1038/scientificamerican07101869-27c
Recent American and Foreign Patents - pp28 - 29
doi:10.1038/scientificamerican07101869-28d
