More on firing anthracite coal
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SUMMARY The closed tracheal system of the aquatic larvae of insects, together with the typical tracheal gill, can only function if the tracheal tubes themselves have sufficient resistance to compression. The work of Ege showed conclusively that the ‘air stores’ of many aquatic insects can, if they are in communication…
A summarizing account is given of the research on barium titanate in progress at the Laboratory for Insulation Research at M. I. T. since 1943. The investigations have led to an understanding of the mechanism of ferroelectricity in the titanates and to discoveries such as the piezoelectric effect in the ceramics and t…
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