Radio reception publications of Bureau of Standards

Announcement has previously been made of the publication of Bureau of Standards Circulars 120 and 121, entitled “Construction and Operation of a Simple Homemade Radio Receiving Outfit” and “Construction of a Two-Circuit Radio Receiving Equipment with Crystal Detector,” respectively. These two circulars describe crystal detector receiving sets and either of them can be purchased from the Superintendent of Documents, Government Printing Office, Washington, D. C., at 5 cents a copy.