Apparatus of MM. Herve Mangon and Gaston Tissandier to dose the carbonic acid of the air, as it was arranged aboard the balloon Zenith, Apparatus for dosing carbon dioxide in a balloon, Signed: Bonnafoux, Fig. 40, p. 156, Bonnafoux (del.), 1887, Gaston Tissandier: Histoire de mes ascensions. Récit de quarante voyages aériens (1868-1886). Paris: Maurice Dreyfous, 1887

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Apparatus of MM. Herve Mangon and Gaston Tissandier to dose the carbonic acid of the air, as it was arranged aboard the balloon Zenith, Apparatus for dosing carbon dioxide in a balloon, Signed: Bonnafoux, Fig. 40, p. 156, Bonnafoux (del.), 1887, Gaston Tissandier: Histoire de mes ascensions. Récit de quarante voyages aériens (1868-1886). Paris: Maurice Dreyfous, 1887

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