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  1. A memoir on British resources of sands and rocks used in glass-making, with notes on certain crushed rocks and refractory materials. By P. G. H. Boswell. With chemical analyses by H. F. Harwood and A. A. Eldridge.

    A memoir on British resources of sands and rocks used in glass-making, with notes on certain crushed rocks and refractory materials. By P. G. H. Boswell. With chemical analyses by H. F. Harwood and A. A. Eldridge.

    Library
    Boswell, P. G. H. (Percy George Hamnall), b. 1886.
    London : New York : Longmans, Green, 1918.
    Books

    Boswell, P. G. H. (Percy George Hamnall), b. 1886. Harwood, Henry Frances, 1886- Great Britain. Ministry of Munitions. 23784 London: New York: Longmans, Green, 1918. 2d ed. complete in one volume. xi, 183 p. ill., x pl. (part fold., incl. col.maps) diagrs ...