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Sir William Bragg Frontispiece 



John L. Baird giving an Early Demonstration of 



Television 18 



John L. Baird seated before the Transmitter in his 



Latest Television Studio 26 



Sir Jagadis Bose 31 



Sir William Bragg demonstrating to Boys and Girls 38 



Luther Burbank among his Flowers 50 



The Late Professor Curie 63 



Madame Curie 66 



Sir Edgeworth David 70 



Professor Edgeworth David and his Companions at 



the South Magnetic Pole 75 



Sir Frank Dyson with ex-King Amanullah at Green- 

 wich Observatory 90 



Professor Einstein 96 



How Light is bent by Gravitation 100 



J. B. S. Haldane 113 



Sir Daniel Hall 118 



Sir Oliver Lodge in his Study 130 



Professor A. M. Low, with the Audiometer which 



he invented to photograph noise i43 



The Marchese Marconi speaking from his Yacht in 



Genoa Harbour to an Audience in Sydney 158 



13 



