OF THE FRANKLIN INSTITUTE DEVOTED TO SCIENCE AND THE MECHANIC ARTS EDITED BY MR. LOUIS E. LEVY, Chairman; MR. EDWIN S. BALCH, MR. JOHN VOL. CLXX.-Nos. 1015-1020 (85th YEAR) JULY-DECEMBER, 1910 PHILADELPHIA Published by the Institute, at the Hall, 15 South Seventh Street. EIGHTY-FIFTH YEAR MR. LOUIS E. LEVY, Chairman; MR. EDWIN S. BALCH, MR. JOHN BIRKINBINE, MR. JAMES CHRISTIE, MR. Physical Production of Light. (Concluded.) By Edw. P. Hyde Phenomena of Flocculation and Deflocculation. (Concluded.) By |