Prov nr 24 (Sample No. 24) Analysis Report

This document, labeled 'Prov nr 24', details the laboratory analysis of two metallic objects recovered in Sala, Sweden, on July 9, 1946. The items were received by the Swedish National Defence Research Institute (FOA) on August 23, 1946. The objects consist of a circular disc (52 mm in diameter and 1 mm thick) with a central 6.5 mm hole, and a second piece described as a pressed circular plate. Both items exhibit signs of melting, particularly around the holes. Spectral analysis determined the material to be a copper-zinc alloy, likely with a high copper content, containing trace amounts of lead and tin. The report notes that the melting appears to have been caused by a hot torch or, more likely, an electrical arc. Following a consultation with Supply Director Edholm of the Royal Board of Waterfalls (K. Vattenfallstyrelsen), it was suggested that the items were components of an electrical device, possibly a copper oxide rectifier. Attempts to verify this with the company ASEA in Stockholm were inconclusive, and a referral to Liljeholm Kabelfabrik did not yield immediate results. The report concludes that further information from the Sala Electricity Works might be required to definitively identify the purpose of the objects.