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You Searched ForStart Over You searched for: Department Archives Remove constraint Department: Archives Place United States Remove constraint Place: United States Rights Public Domain Mark 1.0 Remove constraint Rights: Public Domain Mark 1.0 Subject Science on postage stamps Remove constraint Subject: Science on postage stamps Subject American Chemical Society Remove constraint Subject: American Chemical Society Date 1976 Remove constraint Date: 1976
First day cover created by Artmaster includes cachet depicting a 3D image of a nonexistent molecule. Stamp depicts chemical glassware. Envelope is signed by Herman S. Bloch, the inventor of the catalytic converter.
Cachet created by ArtCraft depicts a male and female chemist working in a laboratory setting, with text reading, "A Century of Modern Chemistry." Cover signed by Glen Seaborg.