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The navigation on distended skins is now everywhere extinct except on the Euphrates. On some of the Nineveh sculptures may be seen men swimming across rivers sustained on these primitive air-vessels.
"Yes, many tons of them," was the reply. "Are they well guarded?" "Yes, with the utmost care. A thousand men of my command watch over them constantly." "Your air-vessels are in perfect order?" "Yes; we drill and exercise with them every day." "You anticipate an outbreak?" "Yes; we look for it any hour." "Have you any further questions to ask General Quincy?" inquired the Prince. "None."
"The internal surface of the lungs or air-vessels in men is said to be equal to the external surface of the whole body, or almost fifteen square feet; on this surface the blood is exposed to the influence of the respired air through the medium, however, of a thin pellicle; by this exposure to the air it has its color changed from deep red to bright scarlet, and acquires something so necessary to the existence of life that we can live scarcely a minute without this wonderful process.
At daybreak one of Quincy's air-ships would come and receive fifty millions of the spoils in gold, as their share of the plunder, and the price of their support. As soon as this was delivered, and carried to their armory, the whole fleet of air-vessels would come up and attack the troops of the Oligarchy.
These tubes are air-vessels; their interiors are lined with elastic, spirally-rolled threads, that serve to keep the channels constantly open; and through these open channels the vital atmosphere rushes with every movement of the membraneous organ.
The invention of the tubular air-vessels and the water-tuyere belongs, we believe, to Mr. John Condie, sometime manager of the Blair Iron Works. Mr. Mushet says, "The greatest produce in iron per furnace with the Black Band and cold blast never exceeded 60 tons a-week. The produce per furnace now averages 90 tons a-week.
Innumerable trains or tribes of motions are associated with these sensitive muscular motions above mentioned; as when a drop of water falling into the wind-pipe disagreeably affects the air-vessels of the lungs, they are excited into violent action; and with these sensitive motions are associated the actions of the pectoral and intercostal muscles, and the diaphragm; till by their united and repeated succussions the drop is returned through the larinx.
Because no ship could hold together under such destructive shells, the nations abandoned their navies and devoted their energy to devising a safe camp for soldiers and to building these air-vessels with additional improvements. It was found that the only way to protect a camp was to cover it with a water proof shed, so constructed that nine or ten inches of water would remain on the roof.
This kind of sea-weed is buoyed up by bladders of air, which are formed in the duplicatures of its leaves; and forms immense floating fields of vegetation; the young ones, branching out from the larger ones, and borne on similar little air-vessels. It is also found in the warm baths of Patavia; where the leaves are formed into curious cells or labyrinths for the purpose of floating on the water.
Surely you will reveal this secret? especially when so many rush into the air-craft business without any idea of the scientific laws by which you uphold your great design? Much has been said and written concerning new schemes for air-vessels moved by steam "
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