In Mendeleeff's classification the elements are arranged in order on a plane surface, so as to increase along one axis in atomic weight, and along the other axis in valence. The properties of an element can then, to some extent, be inferred from its relation to the others on the diagram. Some of the relations are found to be better expressed when the surface is made cylindrical.
Proceedings of the Iowa Academy of Sciences
©1894 Iowa Academy of Science, Inc.
Hall, T. Proctor
"Graphic Representation of the Properties of the Elements,"
Proceedings of the Iowa Academy of Science, 2(1), 141-143.
Available at: https://scholarworks.uni.edu/pias/vol2/iss1/31