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Guyton de Morveau, entrusted by the Academy of Dijon with the building of a sailing balloon, first used a vertical rudder at the rear end of his construction it survives in the modern dirigible. His construction included sails and oars, but, lacking steam or other than human propulsive power, the airship was a failure equally with Guyot's.
In the summer of 1867 an attempt was made to revive the long extinct Aeronautic Company of France, established by De Guyton. The undertaking was worked with considerable energy.
These services were the duty of military engineers, naval engineers, or ship-builders, artillerists, both military and naval, engineers of bridges and highways, geographical engineers, and engineers of mines, and to them were added the service of the pupils of the school of aerostation, which GUYTON MORVEAU had caused to be established at Meudon, for the purpose of forming the aerostatic company destined for manoeuvring air-balloons, applied to the art of war, as was seen at Maubeuge, Fleurus, Aix-la-Chapelle, &c.
They accordingly requested the Minister of the Interior to cause this important operation to be attended by Commissioners chosen from the National Institute. The Class of Physical and Mathematical Sciences of that learned Society appointed to this task, GUYTON and BERTHOLLET, chymists, and the Class of Literature and Fine Arts named VINCENT and TAUNAY, painters.
The chlorine, or oxymuriatic gas of Scheele, was scarcely known before it was applied by Berthollet to bleaching; scarcely was muriatic acid gas discovered by Priestley, when Guyton de Morveau used it for destroying contagion.
The report of Guyton de Morveau to the Academy at Dijon informs us that these different paraphernalia were not altogether useless. The following extracts are from this report:
Marsh relates two cases of phthisis in which the heads of the patients were surrounded by phosphorescent lights. Kaster mentions an instance in which light was seen in the perspiration and on the body linen after violent exertion. After exertion Jurine, Guyton, and Driessen observed luminous urine passed by healthy persons, and Nasse mentions the same phenomenon in a phthisical patient.
Here is an extract from the report of the experiment of the 12th of June, the principal object of which was the attempt to discover the means of steering in a certain direction: "M. de Verley and myself mounted in the balloon," says Guyton de Morveau, "at seven o'clock. We rose rapidly and in an almost perpendicular direction.
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