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Wernwag, Palmer and the Earliest Pennsylvania Covered Bridges

Submitted by Anonymous on Thu, 11/08/2007 - 20:22.
  • Engineering
  • Images
  • Modern (18th-20th Century)
  • Personal
  • Secondary Source

Bridge Signs

Submitted by Anonymous on Thu, 11/08/2007 - 20:22.
  • Artifacts
  • Contemporary (Post-WWII)
  • Engineering
  • Images
  • Modern (18th-20th Century)
  • Personal

Submitted by Anonymous on Thu, 11/08/2007 - 20:22.
  • Computers/Information Technology
  • Consumer Technology
  • Contemporary (Post-WWII)
  • Links
  • Personal
  • Secondary Source

Before the Web

Submitted by Anonymous on Thu, 11/08/2007 - 20:22.
  • Computers/Information Technology
  • Consumer Technology
  • Contemporary (Post-WWII)
  • Personal
  • Primary Source

The WWW Virtual Library

Submitted by Anonymous on Thu, 11/08/2007 - 20:22.
  • Ancient (BCE-40 CE)
  • Aviation/Space Exploration
  • Computers/Information Technology
  • Consumer Technology
  • Contemporary (Post-WWII)
  • Early Modern (15th-18th Century)
  • Earth Sciences
  • Engineering
  • Industrial/Military Technology
  • Life Sciences
  • Links
  • Mathematics
  • Medicine/Behavioral Science
  • Middle Ages (5th-15th Century)
  • Modern (18th-20th Century)
  • Personal
  • Philosophy of Science
  • Physical Sciences
  • Primary Source
  • Secondary Source

Florentino Ameghino (1854-1911)

Submitted by Anonymous on Thu, 11/08/2007 - 20:22.
  • Images
  • Life Sciences
  • Links
  • Modern (18th-20th Century)
  • Personal

Classic Chemistry

Submitted by Anonymous on Thu, 11/08/2007 - 20:22.
  • Links
  • Personal
  • University

String Theory History

Submitted by Anonymous on Thu, 11/08/2007 - 20:22.
  • Contemporary (Post-WWII)
  • Early Modern (15th-18th Century)
  • Educational
  • Links
  • Mathematics
  • Modern (18th-20th Century)
  • Personal
  • Philosophy of Science
  • Physical Sciences
  • Secondary Source

Bell System Memorial

Submitted by Anonymous on Thu, 11/08/2007 - 20:22.
  • Artifacts
  • Computers/Information Technology
  • Consumer Technology
  • Contemporary (Post-WWII)
  • Images
  • Industrial/Military Technology
  • Links
  • Modern (18th-20th Century)
  • Personal
  • Primary Source
  • Secondary Source

History of Engineering

Submitted by Anonymous on Thu, 11/08/2007 - 20:22.
  • Ancient (BCE-40 CE)
  • Computers/Information Technology
  • Consumer Technology
  • Contemporary (Post-WWII)
  • Early Modern (15th-18th Century)
  • Engineering
  • Industrial/Military Technology
  • Middle Ages (5th-15th Century)
  • Modern (18th-20th Century)
  • Personal
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