This large map, drawn on Mercator's Projection, is a superb example of thematic mapping with various colors and diagrams used to illustrate the geological distributions throughout the world. The geological formations are fully colored and a key delineates the six major categories identified by Ami Boué. The first two categories are further divided through subtle differences in shading. There are two inset maps: "Directions of the Systems of Mountains as they appear at Milford by E. de Beaumon ," and "Illustrations of the Synchronism of Parallel Chains" with colored underlining to delineate seven different systems. Also, two hemispheres show the geology of the North and South poles. Along the bottom of the map is a full profile of the "Principle Mountains of the Globe." Surrounded by a decorative keyboard-style border, this handsome chart is from the English version of Heinrich Berghaus' Physikalischer Atlas, the first truly comprehensive thematic atlas. It is a very early example of printed color, the development of which made a huge impact on cartography in general and specifically on the graphic portrayal of geographical data on thematic maps. Plate I in this large atlas. Engraved by W. & A.K. Johnston in Edinburgh. The lot includes the original accompanying 8 pp of text (14" x 21.7") titled "Notes on Some General Principles in Geology; and the Applications."

Ami Boué (1794 - 1881) was an Austrian geologist who received his early education in Hamburg, Geneva and Paris. In 1820 he issued his Essai geologique sur l'Ecosse, primarily focusing on the study of eruptive rocks. His studies of various geological formations led to his becoming one of the pioneers in geological research. He was one of the founders of the Societe Geologique de France in 1830, serving as president in 1835.

References: Marcou & Marcou #5; Phillips (A) #225.

Condition: A

The map is near fine less two very light smudges at lower center and short centerfold split in lower margin. Fine impression and original color on a full sheet with original margins.