Aerial Locomotion 



Glidiug Through the Air on Chauute's Multiple-winged Glider 



Chanute of Chicago, Herring, and other 

 Americans, including the Wright broth- 

 ers, of Dayton, Ohio. 



Hargrave of Australia attacked the fl)'- 

 ing-machine problem from the standpoint 

 of a kite, communicating his results to 

 the Royal Society of New South Wales. 

 It is to him we owe the modern form of 

 kite known as the "Hargrave box kite," 

 which surpasses in stability all previous 

 forms of kites. He also constructed suc- 

 cessful flying-machine models on a small 

 scale, using a store of compressed air as 

 his motive power. He did not attempt to 

 construct a large-sized apparatus or to go 

 up into the air himself ; so he still lives, to 

 carry on researches that are of interest 

 and value to the world. 



SUCCESSFUL FLIGHT OF PROFESSOR LANG- 

 LEV'S MODEL 



No one has contributed more to the 

 modern revival of interest in flying- 

 machines of the heavier-than-air type 



than our own Professor Langle}', the late 

 Secretary of the Smithsonian Institution. 

 The constant failures and disasters of the 

 past had brought into disrepute the whole 

 subject of aerial flight by man; and the 

 would-be inventor or experimenter had 

 to face not only the natural difficulties of 

 his subject, but the ridicule of a skeptical 

 world. To Professor Langley is due the 

 chief credit of placing this subject upon a 

 scientific basis, and of practically origi- 

 nating what he termed the art of "aero- 

 dromics." In his epoch-making work on 

 "Experiments in Aerodynamics," pub- 

 lished in 1891 among the Smithsonian 

 Contributions to Knowledge, he prepared 

 the world for the recent advances in this 

 art by announcing that — 



"The mechanical sustention of heavy bodies 

 in the air, combined with very great speeds, is 

 not only possible, but within reach of me- 

 chanical means we actually possess." 



He also attempted to reduce his prin- 

 ciples to practice by the construction of a 



