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  1. The threshold of science : a variety of simple and amusing experiments illustrating some of the chief physical and chemical properties of surrounding objects, and the effects upon them of light and heat / by C.R. Alder Wright.
    By: Wright, C. R. Alder (Charles Romley Alder),
    Publication info: London :Griffin,1891
    Holding Institution: University of California Libraries (archive.org)
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