Aeronautics, Bureau of, U. S. Navy, 1 

 Air Corps, U. S. Army, 1 

 Aleutian low-pressure center, 8, 12 

 Analysis of Carnegie flights 50 to 83, 



table, 17 

 Antitrades, 11, 12 

 Apia, Samoa Islands, 7, 11 

 Arequipa, 10 



Balloon, 2, 3 



ascensional rate, 2 



filling equipment, 2 



sextant, 3 

 Beals, E. A., 12 

 Beaufort Scale, wind force, 4 

 Bureau of Aeronautics, U. S. Navy, 1 



California high-pressure area, 8 

 Callao, Peru, 6 

 Carnegie, 1 



flights 50 to 83, analysis of, table, 



17 

 meteorological log, 5 

 Chile, 11 

 Cloud, 5 



code and forms, 5 

 estimated height of, above surface 

 of ocean as determined from 

 disappearance of pilot balloons 

 into cloud mass, table, 12 

 forms and abbreviations used, 15 

 heights, 12 

 Color filters, 1 



Data regarding pilot-balloon flights 

 on Carnegie, Pacific Ocean, 1928- 

 1929, table, 39 



Doldrums, Pacific, 5, 11 



Easter Island, 6, 11 



Equatorial region of Pacific Ocean, 

 winds in, 11 



Equipment used in making observa- 

 tions, 1 

 balloons, 2 

 balloon-sextant, 3 

 hydrogen, 2 

 shipboard theodolite, 1 



Error in computed winds owing to, 

 centering field, 3, 4 

 rolling and pitching, 3, 4 

 steering, 3, 4 



Estimated height of cloud above sur- 

 face of ocean as determined from 

 disappearance of pilot balloons 

 into cloud mass, table, 12 



Figures, 45 

 Filters, color, 1 

 Flights, 1 



general distribution, 1 



heights reached, 1 



Free lifts, table, 2 



Frequency of winds from northwest 



quadrant at Peruvian stations, 



table, 10 



Galapagos Islands, 5 

 Guam, 7, 8, 12 



Hawaiian Islands, 8 



trades and antitrades east of 

 latitudes of, 12 



Heights where wind shifts occur, 

 indicating change in air stra- 

 tum, table, 13 



High-pressure area, 

 California, 8 

 upper winds over South 

 American, 11 



Honolulu, 8, 9, 12 



Hydrogen, 2 

 cylinders, 2 



Introduction, 1 



Japan, Pacific Ocean off, 12 



Keuffel and Esser, 1 



Log, meteorological, Carnegie, 5 

 Low-pressure center, Aleutian, 8, 12 



Marianas Islands, 7 

 Meteorological log, Carnegie, 5 



Northeast trades, 7, 8, 9, 10, 12 



Observations, reduction of, 3 



Pacific Ocean, 



data regarding pilot-balloon flights 



on the Carnegie, 1928-1929, 



table, 39 

 off Japan, 12 

 upper -wind components determined 



from pilot-balloon flights 



made on Carnegie, 1928-1929, 



table, 18 

 Pago Pago, Samoa Islands, 7, 9 

 Panama, Gulf of, 5 

 Papeete, 6, 7 

 Perlewitz, P., 10 

 Peru, 6, 10 

 Plotting board, 2, 3 



Reduction of observations, 3 



Samoan Islands, 7, 9, 10, 11 

 Sextant, 



balloon-, 3 



chair, 2 

 Shade glass, 2 

 Signal Corps, U. S. Army, 1 



Society Islands, 11 



South American high-pressure area, 

 upper winds over, 11 



Southeast trades, 6, 7, 9, 10, 11 

 wind directions above, 5 



South Pacific Ocean, trades and anti- 

 trades in the central area of, 11 



St. Ana, 10 



Steering error, example of effect of, 

 on computed wind velocities and 

 directions, table, 4 



Tables, 15 



Theodolite, shipboard, 1 



construction of, 1 



optical system, 1, 2 

 Trades and antitrades, 



east of the latitudes of the 

 Hawaiian Islands, 12 



in the central area of the South 

 Pacific Ocean, 11 

 Trades, 



northeast, 7, 8, 9, 10, 12 



southeast, 6, 7, 9, 10, 11 



wind directions above, 5 

 Trade winds, velocity variation with 



height, 13 



stratification, 13 

 Tuamotu Archipelago, 7, 11, 13 

 Typhoon, 8 



U. S. Weather Bureau, 1 



Upper -wind components determined 

 from pilot-balloon flights made on 

 the Carnegie, 1928-1929, Pacific 

 Ocean, table, 18 



Upper winds over South American high- 

 pressure area, 11 



Velocity of trade winds, variation with 

 height, 13 



Ward, R.de C, 10 

 Weather Bureau, U. S., 1 

 Wind, 



directions in flights 5 to 8, showing 

 complexity of winds immediate- 

 ly above southeast trades, table, 

 5 

 force, Beaufort Scale, 4 

 frequency of, from northwest quad- 

 rant at Peruvian stations, 

 table, 10 

 shifts, heights where occur, indi- 

 cating change in air stratum, 

 table, 13 

 in the equatorial region of the 



Pacific Ocean, 11 

 velocities and directions, example 

 of effect of steering error on, 4 



Yokahoma, 8 



93 



