x The National Geographic Magazine 



Page 



Tetrahedral frames 225 



Four-celled tetrahedral kite 226 



Sixteen -celled tetrahedral kite 226 



Tetrahedral kites .• .... 227 



The aerodrome kite 228 



The aerodrome kite just rising into the air when pulled by a horse 229 



Aerodrome kite in the air 230 



Floating kite , 230 



Body of multicellular giant kite ; triangular box kite 232 



Different views of a multicellular giant kite 233 



Multicellular giant kite rising in the air ._ 234 



Building a windbrake of tetrahedral cells 235 



A completed windbrake showing method of use 236 



Observation house ; views of a winged boat -. 237 



Views of a tetrahedral winged boat 23S 



Views of a non-capsizable kite 239 



Views illustrating mode of studying behavior of bodies in the air 240 



Views illustrating experiments with kites formed of open tetrahedral cells 241 



Views illustrating experiments to determine relation of center of gravity to center of sur- 

 face in flying structures 242 



Views illustrating experiments with varying arrangement of cells. 243 



Views illustrating experiments with varying number of cells : 244 



Views of a multicellular kite having six sets of cells and of a giant kite having three 



twelve sided cells 245 



Views of a hexagonal kite and a twelve-sided kite 246 



Views of a paddlewheel kite 247 



Prospecting for gold in Alaska with reindeer as pack animal . . 256 



John W. Foster 260 



A steam plow in the great valley of California 265 



Front view of a steam harvester-thrasher used on the Pacific coast 266 



Rear view of steam harvester-thrasher 267 



Between the walls of 100,000 sacks of wheat at Mission, Oregon 269 



Sacked wheat awaiting shipment 270 



A portion of the grain fleet in Portland Harbor, Oregon 271 



Thrashing rice with a steam thrasher in southwestern Louisiana 273 



Harvesting rice in southwestern Louisiana 274 



A field of pumpkins grown for seed 276 



A field of silverskin onions on Bloomsdale farm, Philadelphia 277 



Cattle being fattened for export 278 



A colossal Californian pumpkin 2S0 



A giant Californian potato vine 281 



Paul du Chaillu 283 



Flood scene, Marion, Ark. , March, 1903 286 



Camps of negro refugees, flood of March, 1903 288 



Tetrahedral kite in the air 294 



Diagram showing value of manufactures in the United States, 1S10-1900 303 



Diagram showing increase in value of manufactures, 1810-1900 304 



Diagram showing value of manufactures per capita, 1810-1900 304 



Diagram showing value of manufactures in United States, 1810-1900. . 303 



Diagram showing increase in value of manufactures, 1810-1S40, and in each decade from 



1840-1900. ... 304 



Diagram showing value of manufactures per capita, 1810-1900 304 



