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Figure 1
Ray Pepinsky explaining the X-RAC analogue computer system for Fourier syntheses and display of contour maps. Left to right: Fankucken, Robertson, Low, Hughes, Friedman, Wrinch, Pepinsky. Inset left: assembly of S-FAC units at X-RAC oscilloscopes; inset right: X-RAC contour map of phthalocyanine [taken from Fig. 105, Fig. 116 and Fig. 72 of the Pepinsky (1952eBB141) computing monograph; courtesy of Penn State University.]

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ISSN: 2053-2733
Volume 64| Part 1| January 2008| Pages 65-87
https://doi.org/10.1107/S0108767307051355
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