Page:My Airships.djvu/236

 one is not in a state to guide, constitutes the easiest of performances. A little cat has done it at the Folies-Bergère." Now in war service overland the air-ship will, doubtless, have often to mount to considerable heights to avoid the rifle fire of the enemy, but, as the maritime auxiliary described by the expert of the French Navy, its scouting rôle will for the most part be performed at the end of its guide rope, comparatively close to the waves, and yet high enough to take in a wide view. Only when for easily-imagined reasons it is desired to mount high for a short time will it quit the convenient contact of its guide rope with the surface of the sea. For these considerations—and particularly the last—I was anxious to do a great deal of guide-roping over the Mediterranean. If the maritime experiment promises so much to spherical ballooning it is doubly promising to the air-ship, which, from the nature of its construction, carries comparatively little ballast. This ballast ought not to be currently sacrificed, as it is by the spherical balloonist, for the remedying of every little vertical aberration. Its purpose is for use in great emergencies. Nor ought the aerial navigator,