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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.
This was the final blow to the phlogiston theory, which, although it had been tottering for some time, had not been completely overthrown. In 1787 Lavoisier, in conjunction with Guyon de Morveau, Berthollet, and Fourcroy, introduced the reform in chemical nomenclature which until then had remained practically unchanged since alchemical days.
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.
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.
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.
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:
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