Henry Giffard's apparatus for the preparation of hydrogen by the dry route, Apparatus for the production of hydrogen by Henri Giffard, Fig. 29, p. 116, 1887, Gaston Tissandier: Histoire de mes ascensions. Récit de quarante voyages aériens (1868-1886). Paris: Maurice Dreyfous, 1887

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Henry Giffard's apparatus for the preparation of hydrogen by the dry route, Apparatus for the production of hydrogen by Henri Giffard, Fig. 29, p. 116, 1887, Gaston Tissandier: Histoire de mes ascensions. Récit de quarante voyages aériens (1868-1886). Paris: Maurice Dreyfous, 1887

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