1851 Great Exhibition: Official Catalogue: Class X.: Augustus Petermann
711. PETERMANN, AUGUSTUS, Camden Street, Camden Town — Producer and Manufacturer.
Geographical illustrations, consisting chiefly of physical and statistical maps of the world.
Specimens in manuscript, drawn with the pen and brush, and comprising plans and maps to show the physical configuration of certain countries.
Specimens engraved on metal (steel and copper). The various shadings and tints produced partly by machine- ruling, partly by aqua-tint: this latter method is very rarely employed for mapping, on account of certain difficulties in the combination of the shading with the outline and writing; when successful, it produces effects more correct and finer than other methods.
Specimens engraved on stone. The process of engraving maps and plans on stone, is very little used in this country, although it possesses considerable advantages over drawing them on stone, or engraving them on metal.