COPYRIGHT, 1888, 1909, BY WILLIAM H. MEADOWCROFT
COPYRIGHT, 1915, BY HARPER & BROTHERS
PRINTED IN THE UNITED STATES OF AMERICA
PUBLISHED MAY, 1915
From the Laboratory of Thomas A. Edison
Orange, N. J.
Mr. W. H. Meadowcroft,
New York City.
DEAR SIR:
COPYRIGHT, 1888, 1909, BY WILLIAM H. MEADOWCROFT
COPYRIGHT, 1915, BY HARPER & BROTHERS
PRINTED IN THE UNITED STATES OF AMERICA
PUBLISHED MAY, 1915
From the Laboratory of Thomas A. Edison
Orange, N. J.
Mr. W. H. Meadowcroft,
New York City.
DEAR SIR: