PERCY, C. M. An Inaugural Address [on] Colliery Machinery. [Haydock Mining Lectures.] Tract. 8vo. vol. 488.

Wigan, 1890. 8vo.

The Mechanical Engineering of Collieries. 2 vols.

Lond. 1885-86. 8vo.

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PERCY, J.
1885 (1886).

Lond. 1885, 86. 8vo.

Letter to the Chancellor of the Exchequer and Correspondence
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Metallurgy. 9 vols. [MS.]

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Metallurgy....

Metallurgy....

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Tract. 8vo. vol. 209.

See NATHAN, M. Notes of Six Lectures 1883.

PERDONNET,

A. Traité élémentaire des chemins de fer. 2 vols.
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2e édition. 2 vols.

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PERDONNET, A., and POLONCEAU, C.

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PEREIRA, J. Lectures on Polarized Light, together with a lecture on the microscope. 2nd edition.

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PEREZ DE LA SALA, P. Señales maritimas. Lecciones explicadas en la Escuela especial de ingenieros de caminos canales y puertos.

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Madrid, 1868. 8vo. and folio.

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Classification of

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9

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...

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