Descriptive catalogue of "steel mixture": boiler door arches, fire box blocks and back combustion chamber arches
A 1916 trade catalogue issued by McLeod & Henry Co. for its "steel mixture" refractory products, namely boiler door arches, firebox blocks and back combustion chamber arches, aimed at boiler makers and industrial furnace builders. Its pictures are isometric cutaway drawings of arch and block assemblies, with dimension letters and a cross-section of a boiler with brick firebox lining, which a designer could use for clear technical diagram styling and labelled line drawings.
