183 THE CATHOLIC WORLD, October, 1874, p. 1.

184 THE CATHOLIC WORLD for September, 1874. p. 729. Mr. Stallo might

also see the _Elements of Molecular Mechanics_, book vi., on the

constitution of molecules.

185 See THE CATHOLIC WORLD, March, 1874, p. 757. Also, August, 1874, p.

644 et seq.

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