ILLUSTRATIONS 



Page 



Lilienthal gliding machine as reproduced in America for Chanute by Herring 2 



Gliding through the air on Chanute's multiple-winged glider 3 



Langley's aerodrome No. 5 in flight, May 6, 1896 4 



The accident to Langley's aerodrome 6 



Starting a flight 8 



A high glide 8 



Soaring 9 



Landing 9 



Unit cell having the form of the regular tetrahedron 12 



A. Single-winged cell. B. Four-celled kite. C. Sixteen-celled kite. D. Sixty-four- 

 celled kite 13 



Sixty-four-celled tetrahedral kite flying from the flag-pole 14 



Carrying the "Frost King" onto the testing ground 15 



Side view of the "Frost King," showing how closely the cells are massed together 16 



The "Frost King" in the air flying in a ten-mile breeze and supporting a man on the 



flying rope 17 



I. Two i6-celled tetrahedral kites. 2, 3, 4. Oionos kite with fixed tail. 2. Front view. 



3. Bottom view. 4. Top view 19 



Method of flying the Oionos kite 20 



Oionos kite with movable tail controlled by swinging head-load of lead 20 



Oionos kite in the air 21 



Kite "Siamese Twins" seen from the front 22 



Kite "Siamese Twins" seen from the rear, looking inside kite 23 



Side view of "Mabel 11" 24 



"Mabel 11" outlined against sky, showing bird-wing effect 24 



A floating kite, adapted to be towed out of the water 25 



"The Ugly Duckling" 26 



Some of the balloons which took part in the great race for the Gordon Bennett Cup. ... 29 



The French Military dirigible, "Patrie," in flight 30 



The new Deutsch airship "Ville de Paris" 30 



Count Von Zeppelin's airship — the largest and fastest thus far constructed 31 



Santos-Dumont's aeroplane 32 



The aeroplane making its first successful free flight with its owner in control 32 



A flock of Angora goats in our new state, Oklahoma 35 



The great new lake rising in the Salton Sink 36 



A section of the Imperial Valley which was at first inundated and then left high and 



dry by the deepening channel 39 



The way in which acres and acres of fine farm lands are undermined and washed into 



the New River channel 40 



Cutting work of the New River 45 



The great Salton Sea, 205 feet below sea -level at this point 46 



A few months ago this was fertile land cultivated by prosperous people. Looking down 



New River canyon 47 



The Hubbard Medal of the National Geographic Society, the first award of which was 



made to Commander Peary December 15, 1906 48 



"We crossed the Arctic Circle" 73 



Hauling the carcass of a Polar bear aboard the ship 74 



"Louise" 75 



