Loading...
Science, engineering, and mathematics — biology, chemistry, physics, astronomy, earth sciences, social sciences, and technology research. A curated gateway to academic and professional scientific resources.
57129 resources
Full text of case before the U.S. Supreme Court in 1877. Concerns the infringement of two patents belonging to the company.
Facsimile of the company catalogue published around 1874.
Photographic records of three bridges constructed by Keystone.