ly overcome, and which makes enough perimenting in this field, with more or less success. steam balloon oxperiment of 1855, and the constructor zine soap alkaline to print an almost unlimited num- The writer, who has given a description of a process of of the Dupuy cc Lome screw balloon, as well as… … with it, and finally he succeeded in this. The fol- Fig. 1—CAR OF A MILITARY BALLOON. condition being indispensable for the success of lowing lines give an exact description of it. It is the observation. The car, as shown in Fig. 1, well known that the process of photography is an electric one, the…
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