. The boys' life of Edison . tant the beginning of 1919 he has filed 44 applicationsfor patents and 40 patents have been issued to him inthat period. Altogether, about 1,150 patents have beenissued to him. During the last two or three years he hastaken over the active management of his commercial en»terprises and carried them on with his accustomed vigor.!He still works from 16 to 18 hours a day. 2^2. EDISON AT WORK IN ONE OF THE CHEAIICAL ROOMS AT THE ORANGELABORATORY THE BOYS LIFE OF EDISON BY WILLIAM H. MEADOWCROFT OF THE EDISON LABORATORY. AUTHOR OFaBC of ELECTRICITY, aB
. The boys' life of Edison . tant the beginning of 1919 he has filed 44 applicationsfor patents and 40 patents have been issued to him inthat period. Altogether, about 1,150 patents have beenissued to him. During the last two or three years he hastaken over the active management of his commercial en»terprises and carried them on with his accustomed vigor.!He still works from 16 to 18 hours a day. 2^2. EDISON AT WORK IN ONE OF THE CHEAIICAL ROOMS AT THE ORANGELABORATORY THE BOYS LIFE OF EDISON BY WILLIAM H. MEADOWCROFT OF THE EDISON LABORATORY. AUTHOR OFaBC of ELECTRICITY, aBC OF THE X-RAYS WITH AUTOBIOGRAPHICAL NOTES BY MR. EDISONILLUSTRATED
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Keywords: ., bookcentury1900, bookdecade1920, bookpublishernewyo, bookyear1921
