WILLIAM H. DOOLEY
Reading edition
PRINCIPAL LOWELL INDUSTRIAL SCHOOL LOWELL, MASS.
REVISED EDITION WITH EXPERIMENTS
D. C. HEATH & COMPANY BOSTON NEW YORK CHICAGO
COPYRIGHT, 1910, 1912, AND 1914, BY D. C. HEATH AND COMPANY
COTTON PLANT

Reading edition
PRINCIPAL LOWELL INDUSTRIAL SCHOOL LOWELL, MASS.
D. C. HEATH & COMPANY BOSTON NEW YORK CHICAGO
COPYRIGHT, 1910, 1912, AND 1914, BY D. C. HEATH AND COMPANY
COTTON PLANT
