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The Nerdiest Christmas Cards Ever May Be 

These Microscope Slides Composed of Shells

The unusual holiday exchange, which lasted 

decades during the early 20th-century, hints 

at the drama between the two colleagues

Smithsonian By Allison C. Meier, December 17, 2018



A century ago, two scientists exchanged

fantastic microscope slides as Christmas cards





Paul H.

  • I found this Informative 4
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Fascinating, I'm very familiar with Heron-Allen as a violin author but was completely unaware of his other interests.

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