| This crystal radio set is in the Millington/Barnard Collection
in the University Museum at the University of Mississippi.
The detector can be seen at the left front of the baseboard. It consists of a fine crystal of galena (lead sulphide) with a fine wire or cat's whisker resting gently on its surface to made the rectifying contact.
| The crystal set tuner at the right is home-built,
and has many of the characteristics shown in the Department of Commerce Circular
of the Bureau of Standards, Bulletin No. 121, "Construction and Operation
of a Two-Circuit Radio Receiving Equipment with Crystal Detector", issued
July 17, 1922.
The tuner is in the Greenslade Collection.