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Fortunately, however, the caloric developed by the Reiset and Regnault process for purifying the air, raised the internal temperature of the Projectile a little, so that, with an expenditure of gas much less than they had expected, our travellers were able to maintain it at a degree capable of sustaining human life.
Any way, the far-seeing Frenchman had taken care not to forget in his collection some precious cuttings of the Médoc and Côte d'Or, upon which he counted particularly. The Reiset and Regnault apparatus always worked with extreme precision. The air was kept in a state of perfect purity.
The question of air in the interior of the projectile also offered all security. The Reiset and Regnault apparatus, destined to produce oxygen, was furnished with enough chlorate of potash for two months. It necessarily consumed a large quantity of gas, for it was obliged to keep the productive matter up to 100°. But there was abundance of that also. The apparatus wanted little looking after.
Barbicane, his two companions, and two dogs that he meant to take, would consume every twenty-four hours 2,400 litres of oxygen, or a weight equal to 7 lbs. The air in the projectile must, therefore, be renewed. How? By a very simple method, that of Messrs. Reiset and Regnault, indicated by Michel Ardan during the discussion of the meeting.
Still, although it was so important to economise gas, the excessive lowness of the surrounding temperature forced them to consume a certain quantity. They could not do without either its light or heat. Happily the caloric developed by the Reiset and Regnault apparatus slightly elevated the temperature of the projectile, and without spending much they could raise it to a bearable degree.
The great dress-makers of those days were Madame Eloffe, the artist who dressed Marie Antoinette, and whose account-books have recently been published; with notes and curious colored plates, by the Comte de Reiset, and Madame Cafaxe, the modiste-couturière of the Fauburg St.-Honoré, celebrated for her exorbitant charges.
Reiset and Regnault, had made the experiment with success. But it must be said the experiment had only been made in anima vili. Whatever its scientific accuracy might be, no one knew how man could bear it. Such was the observation made at the meeting where this grave question was discussed.
Thus, during their passage, and for the first year of their settlement on the lunar continent, these adventurous explorers would suffer neither hunger nor thirst. Now about the air in the projectile. There, too, they were secure. Reiset and Regnaut's apparatus, intended for the production of oxygen, was supplied with chlorate of potassium for two months.
During the journey, therefore, and for the first year of their installation on the Lunar continent, the daring travellers would be pretty safe from all danger of hunger or thirst. The air supply proved also to be quite satisfactory. The Reiset and Regnault apparatus for producing oxygen contained a supply of chlorate of potash sufficient for two months.
Crowe and Cavalcaselle's theory rested in the main, though not so entirely as Giovanni Morelli appears to have held, on the signature and the early date to be found on a Santa Conversazione, once in the collection of M. Reiset, and now at Chantilly in that of the late Due d'Aumale.
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