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equitorial armillary sphere (replica)
Grace Murray Hopper Collection
Science Vol. 104, No. 2712 Friday, 20 December 1946 (pp. 581-608): NRC [National Research Council] News (p. 595) Division of Physical Sciences announces formation of new Committee on High-Speed Calculating Machines. Chairman: John von Neumann, Members:...
Duplex Pendulum Seismograph