Banknotes of Different Countries (In Past and Now) (Popularity: )

Images of currency of Ukraine, Austria, Brasil, Germany, Hungary, Poland, Yugoslavia, USA, Greece, Singapore, and ...
Category: Science\Social Sciences\Economics\Economic History

Sterling Resale Optics (Popularity: )

Resale of un-used or excellent condition optics including mirrors, lenses, filters, and KTP crystals for ...
Category: Science\Instruments and Supplies\Laboratory Equipment\Used and Surplus

International Gem Society (Popularity: )

Dedicated to bringing quality information and educational services to everyone interested in gemstones.
Category: Science\Earth Sciences\Geology\Rocks and Minerals

Handbook of Formulae, Equations and Conversion Factors for the Energy Professional (Popularity: )

Book and CD versions for sale. Site includes example pages.
Category: Science\Technology\Energy\Publications

Slide Rule Scales (Popularity: )

Describes the types of scales found on most slide rules.
Category: Science\Math\Education\Slide Rules

Many Facets Rock Shop (Popularity: )

Minerals, fossils, gems & settings, jewelry making tools-equipment-metals-findings.
Category: Science\Earth Sciences\Geology\Rocks and Minerals

American Stirling Company (Popularity: )

Manufacturer of educational models, fans, hand heated and full power engines. Includes forum, FAQs and ...
Category: Science\Technology\Energy\Devices

Quiet Revolution Motor Company (Popularity: )

Dedicated to advancing the engine technology in aircraft and other commercial uses. Includes photos, articles, ...
Category: Science\Technology\Energy\Devices

Scientists Have Found Oldest Shipwreck in Alaska (Popularity: )

From Kenai Peninsula Online, scientists say they have found what they believe to be the ...
Category: Science\Social Sciences\Archaeology\Topics