Table of contents
July 8, 1868, Volume 19 No 2 pp17-31
About the coverBusiness and Personal
Top of page
Top of pageArticles
Improvement in Machine for Forming Rings, Watch Case Centers, etc. - p17
doi:10.1038/scientificamerican07081868-17
The Impossible in Constructive Science - pp18 - 19
doi:10.1038/scientificamerican07081868-18
Manufacturing, Mining, and Railroad Items - p22
doi:10.1038/scientificamerican07081868-22a
Recent American and Foreign Patents - pp22 - 23
doi:10.1038/scientificamerican07081868-22b
Effect of Labor-Saving Machinery Upon Wages - p25
doi:10.1038/scientificamerican07081868-25
