The immensity of the seas seemed to be the only source of insurmountable difficulties; “but,” says Robertson, “over what a vast space might not one travel in six months with a balloon fully furnished with the necessaries of life, and all the appliances necessary for safety? Besides, if, through the natural imperfection attaching to all the works of man, or either through accident or age, the balloon, borne above the sea, became incapable of sustaining the travellers, it is provided with a boat, which can withstand the waters and guarantee the return of the voyagers.”
Such were the ideas promulgated regarding the “Minerva.” The following is the serious description given of the machine. The numbers correspond with those on the illustration.
“The cock (3) is the symbol of watchfulness; it is also the highest point of the balloon. An observer, getting up through the interior to the point at which the watchful fowl is placed, will be able to command the best view to be had in the ‘Minerva.’ The wings at the side (1 and 2) are to be regarded as ornamental. The balloon will be 150 feet in diameter, made expressly at Lyons of unbleached silk, coated within and without with indict-rubber. This globe sustains a ship, which contains or has attached to it all the things necessary for the convenience, the observations, and even the pleasures of the voyagers.
“(a) A small boat, in which the passengers might take refuge in case of necessity, in the event of the larger vessel falling on the sea in a disabled state.
“(b) A large store for keeping the water, wine, and all the provisions of the expedition.
“(cc) Ladders of silk, to enable the passengers to go to all parts of the balloon.
“(e) Closets.
“(h) Pilot’s room.
“(1) An observatory, containing the compasses and other scientific instruments for taking the latitude.
“(g) A room fitted up for recreations, walking, and gymnastics.