The apparatus, invented by Herschel K. Mitchell, is called a chromatopile and represents a cross between earlier glass column and paper chromatography methods. Biology.
Campbell, petrologist, served as executive officer for the Division of Geological and Planetary Sciences for several years in the 1940s and 1950s, in addition to being Acting Chairman in 1951-1952. Campbell left Caltech in 1959 to become California ’s State Geologist.
Two identical pieces. Designed for use with Beckman Flame Photometry attachment to the DU spectrophotometer. Hand-written on boxes “Used 1954” and “Used 1956.” Both with original instructions and packing.
