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aorta communis campylodiscus ecclesianus drosophila (drosophila) rubrrima dry-bulb gallium phosphide George Wells Beadle independent working longitudinal bar spacing moment of spectrum normopath octadecyl trichlorosilane photographic emulsion speed indicator porcelain bead prism mass spectrometer sharwals speaker-independent recognition train signal pipe trebilco Unitarian Universalist valve-out