PSN-L Email List Message

Subject: History Matters
From: "Warner, Deborah J." warnerd@......
Date: Thu, 12 Apr 2012 15:55:46 -0400


I would like to find a torsion seismograph of the sort introduced in 1950 b=
y William F. Sprengnether, Jr., and sold in kit form.

Deborah Warner
Curator, Physical Sciences Collection
National Museum of American History
Washington, D.C. 20013-7012

I would like to = find a torsion seismograph of the sort introduced in 1950 by William F. Spr= engnether, Jr., and sold in kit form.

 

Deborah Warner

Curator, Physical Sciences Collection

National Museum of American History

Washington, D.C. 20013-7012

 

=

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