It was invented by Dr. Lee deforest to detect wireless.
"The Dream Doctor"
Arthur B. Reeve
Through the kind assistance of the Chairman of The Stock Exchange Luncheon Club, the picture was sold for the substantial sum of $500. The Treasurer, with ample funds at his disposal, was able to meet calls for financial help that were frequent and pressing, and recognizing the desirability of experienced and competent assistance in making the necessarily intimate inquiries, to determine if applicants for relief were worthy, he applied to Mr. Robert W. deforest, President of The Charity Organization Society, for expert advice in the matter, and was referred by Mr. deforest to Mr. Frank Persons, Manager of the New York Bureau, and Miss Byington, in charge of the Brooklyn Branch, who rendered invaluable services in connection with many of the applications, all of which were carefully investigated.
"The New York Stock Exchange in the Crisis of 1914"
Henry George Stebbins Noble
deforest the mountains and the water floods the streams and is wasted, crop the plains and they become a desert.
"The Boy With the U. S. Survey"
Francis Rolt-Wheeler