Model of Simon-Carves-Monsanto contact sulphuric acid plant with Freeman flash roasters ( scale 1:96) Simon-Carves-Monsanto contact process sulphuric acid plant, c 1952. 1952
Model, scale 1:24, anotated, of generic alkali works (illustrates the Leblanc process) Alkali works illustrating the Leblanc process, late 19th century. 1890-1894