President of the Colorado Scientific Society – 1895
Mining and metallugical engineer
Graduate Polytechnic Institute Brooklyn, 1882; E. M. School of Mines (Columbia), Hon. M. Sc., 1914; D. Sc. 1929
Manager, smelters at Pueblo and Leadville, Colorado; El Paso, Texas; Argentine, Kansas; San Luis Potosi and Cananea, Mexico. President, Dwight and Lloyd Sintering Company
Alumni trustee Columbia University 1915-21; Member, American Institute of Mining and Metallurgical Engineers (life, ex-president; Douglas medalist); Mining and Metallurgical Society of America; Society of America Military Engineers; Institute of Mining and Metallurgy of London (honorary); honorary member Society of Engineers of Louvain University Belgium
Co-inventor with R. L. Lloyd of Dwight & Lloyd system of ore treatment