Descente du ballon le Pôle Nord à Auneau (Eure et Loir) le 27 juin 1869, par G. Tissandier; Diagram shows (1) Trajectoire de l'aérostat (elévation) and (2) Courbe de trainage (plan) to document the barometric measurements for altitude and distance covered, made by Gaston Tissandier in the balloon Pôle Nord during voyage from Champ de Mars, Paris to Anneau, June 26-27, 1869. (Source: Renstrom, LC staff, 1981-82).

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