Background
Callow, John Michael was born on July 7, 1867 in Northrepps, Norwich, Norfolk, England. Son of Michael John and Emily (Neave) Callow.
Callow, John Michael was born on July 7, 1867 in Northrepps, Norwich, Norfolk, England. Son of Michael John and Emily (Neave) Callow.
Educated in England; came to the United States, 1890.
Engineer and draftsman with Stearns, Roger Manufacturing Company, 1892-1893. Engineer Metallic Extraction Company, 1894. Operating mines and mills in San Juan Company, Colorado, 1895-1896.
On engineering staff Samuel Newhouse, 1898-1901.
Private practice, 1901-1906, inventing Callow settling tank and Callow traveling belt screen. President and manager General Engineering Company, New York, since 1906.
Designed and built 500-ton plant for National Copper Company, Mullan, Idaho, installing pneumatic flotation cells, 1912. Designing and construction engineer, Mount Isa Mines, Australia, 1928-1931.
Originator of pneumatic flotation in treatment of ores.
Awarded 18 patents.
Mason. Episcopalian.
Married Roberta More, 1893. Children: Bessie Roberta, Margaret Roper More, Francis Marie, Michael John.