BIOGRAPHICAL INDEX 



and nebulae, which, though widely accepted, 

 aroused much discussion. Was an officer of the 

 Geological Survey of Scotland. 



Crompton, Samuel, ix, 32. Born at Firwood, 

 near Bolton, England, Dec. 3, 1753; died at Hall- 

 in-the-Wood, near Bolton, June 26, 1827. An 

 English mechanic and inventor. In 1779 he in- 

 vented the "Mule," a spinning machine vastly 

 superior to any machine then in use. 



Crookes, Sir William, iii, 249, v, 103. Born 

 at London, 1832. English physicist and chemist. 

 Studied and taught at Royal College of Chemis- 

 try, Oxford, and Chester. Famous sanitary ex- 

 pert. His experiments with high vacua 

 made the incandescent light possible. Discov- 

 erer of the element thallium, also the sodium 

 amalgamation process for separating gold and 

 silver from their ores. Devised new method of 

 spectrum analysis for which the radiometer and 

 otheoscope were invented. 



Ctesbius, i, 243. Born at Alexandria; lived 

 Third Century B.C. Greek mathematician, and 

 tutor of Hero. Probably inventor of the force 

 pump, and discoverer of the elastic force of air, 

 with its possible application as motive power, all 

 of which has been described by Hero. 



Cunard, Sir Samuel, vii, 74. Born at Halifax, 

 Nova Scotia, 1787; died at London, April 28, 

 1865. A civil engineer, founder of the Cunard 

 Steamship Line. The first ship of this line, the 

 "Britannia," crossed the ocean in 1840. 



Curie, Professor Pierre, v, 100. Born at Paris, 

 1859; died at Paris, 1906. French physicist. 

 Educated at Paris, became Professor of Physics 

 at the Sorbonne, 1895. Noted for his researches 



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