Collier's new encyclopedia : a loose-leaf and self-revising reference work ..with 515 illustrations and ninety-six maps . THOMAS A. EDISON ments, wherever he could find them. Hisfirst invention to be patented was a com-mercial stock indicator, and the proceedsof this invention, which at once came intflwide use, enabled him to establish a labo-ratory at Newark, N. J., afterward re-moved to Menlo Park, and then to itspresent location at West Orange, N. this beginning he became known to.

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Keywords: ., bookcentury1900, bookdecade1920, bookpublishernewyo, bookyear1921