With tin near the top of the list of strategic metals, the main purpose of this project was to determine:

The geographic distribution of tin in Mason County.
The source of the tin.
The amount of placer and/or lode tin present per unit volume of sand or vein.
Secondary purposes were to determine what minerals, if any, occurred with the tin, what minerals occurred in the metamorphics rimming the granite, and to search for deposits of magnesite.

Two mimeographed maps are included in this circular. The first shows the areal outline of the fine-grained granite of the Streeter-Grit area with the location of placer tin indicated by an "x". In the second, the location and areal geology of the magnesite deposit is shown.