See chapter in Cressy's "Discoveries and Inventions of Twentieth
Century." "Oxy-Acetylene Welders," Bulletin No. 11, Federal Board of
Vocational Education, Washington, June, 1918, gives practical directions
for welding. _Reactions_, a quarterly published by Goldschmidt Thermit
Company, N.Y., reports latest achievements of aluminothermics. Provost
Smith's "Chemistry in America" (Appleton) tells of the experiments of
Robert Hare and other pioneers. "Applications of Electrolysis in
Chemical Industry" by A.F. Hall (Longmans). For recent work on
artificial diamonds see _Scientific American Supplement_, Dec. 8, 1917,
and August 24, 1918. On acetylene see "A Storehouse of Sleeping Energy"
by J.M. Morehead in _Scientific American_, January 27, 1917.