ENCYCLOPAEDIC GENERAL INDEX 



(This Index brings together, under one alphabet, all the impor- 

 tant technical terms and the most prominent names of men in all 

 departments of science, theoretical and applied. It does not 

 ordinarily define terms, nor does it aim to give biographical data 

 except insofar as these are necessary to make the reference spe- 

 cific. Its purpose is to analyze the text in a m inner at once detail- 

 ed and comprehensive, with the sole object cf guiding the reader to 

 the text itself. Nevertheless, the references are so phrased as 

 to convey, first and last, an enormous amount of information. 



The figures in heavy type refer to volumes; those in ordinary 

 type to pages. 



For concise definition of terms see the Technical Index and 

 Glossary; for Biographical data see the Biographical Index, both 

 in the present volume.) 



ABD-EL-LETIF, Arabian physi- 

 cian, 2, 21. 



Abel, Sir P., experiments with 

 cordite for obtaining high 

 temperature, 6, 315. 



Abruzzi, Duke of, his efforts to 

 find the pole, 7, 48. 



Absolute zero, approach to the, 

 made by liquefying hydrogen, 

 6, 69; probable form of all 

 matter at, 5, 70; quest of, 5, 

 72. 



Academia Naturas Curiosorum, 

 founded in Germany, 2, 201. 



Accademia del Cimento, 2, 200. 



Acetylene Gas, the introduction 

 of, 6, 212 (see also Gas, 

 illuminating) . 



Adams, Isaac, a printing press 

 invented by, 8, 122. 



Adams, John Couch, predicted 

 the discovery of the planet 

 Neptune, and independently 

 calculated its position, 3, 42; 

 discovers an error in Laplace's 

 calculation about the moon, 

 3, 48. 



Aeroplane (see also Navigating 

 the Air), the triumph of the, 



Chapter X, 7, 272; Langley's 

 early experiments and dis- 

 coveries, 7, 275; experiments 

 in soaring, 7, 277; the flying 

 machine of Lilienthal, 7, 279; 

 the flying machines of Maxim 

 and Langley, 7, 283; Lang- 

 ley's description of his ma- 

 chine called the " aerodrome," 

 7, 284; the practical flying- 

 machine invented by Wilbur 

 and Orville Wright, 7, 288; 

 the successful flight of Henry 

 Farman, 7, 293; a series of 

 flights by Wilbur and Orville 

 Wright, 7, 293; Latham's 

 attempt to fly across the 

 English Channel, 7, 294; Ble- 

 riot's successful flight, 7, 294; 

 the remarkable flight of 

 Charles R. Rolls, 7, 294; 

 flights made by Orville 

 Wright near Washington, and 

 at Berlin the same year, 7, 

 295; Wilbur Wright's flight 

 up the Hudson, 7, 295; 

 Paulhan's successful flight 

 from London to Manchester, 

 7, 296; Curtiss' flight from 



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