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Quartz Crystal - Model

Note on back: "Dr. John Weil (seated) examines a model of a quartz crystal with Darbha Suryanarayana, a post-doctoral fellow whose employment is subsidized by the NRC [National Research Council] fund. The instrument in the background is an electron paramagnetic resonance spectrometer, which is used to analyze defects in quartz crystals".

Soil Science - Research

Note on back: "Brazilians (l to r) Julio Meira e Sa, Clemente Carneiro da Silva, Marivone Gonzaga de Almeida, and Waldeciro Colaco gather a cylinder of soil adjacent to the U of S experimental grain plots for isotopic and nutrient analysis. The students are undertaking two-year doctoral soil science studies at the University and will return to Brazil in the fall of 1978 to begin projects related to tropical soils".

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