Astra Castra

Astra Castra

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Being adapted to an aerostat sufficiently large to carry the requisite engines, it will devour space without effort, and leave behind, as far as rapidity is concerned, ... Diagram showing tub Coonterbalancinq demonstrate the superior forceanbsp;...

Title:Astra Castra
Author:Hatton Turnor
Publisher: - 1865


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