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RECENT PROGRESS IN AERIAL NAVIGATION.
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Fig. 5 is a design of Theodore Liebrand. The cylinder is of aluminum, and the wings transform themselves into wheels when the machine rims along the ground. I have no record of the actual success of either Merritt's or Liebrand's inventions, or even of their trial.
Returning to the realm of actual experiment, in Figs. 6 and 7 are shown views of Carl F. Myers's 'sky-cycle.' Of this Mr. Myers
Fig. 2. Santos Dumont's Dirigible Balloon (I).
Fig. 3. Santos Dumont's Dirigible Balloon (II).
writes, under date of February 5, 1900, with the enthusiasm of the inventor:
"The sky-cycle, or gas-kite, is a hand and foot propelled air-ship, provided with revolving screw-sails, vibrating wings, movable aeroplanes and universal rudder—the object of the entire equipage being to test
