Tillägg till Preliminär rapport över de undersökningar, som under tiden 12/7 - 8/8 1946 utförts vid FOA, 1, av tillvaratagna rester av förmodade raketprojektiler

This document is an addendum to a preliminary report issued by the Swedish National Defence Research Institute (FOA 1) regarding the investigation of recovered remnants of suspected rocket projectiles. The report covers investigations conducted between July 12 and August 8, 1946. It serves to update a previous preliminary report dated August 9, 1946, concerning findings received by FOA 1 up to August 8. The document confirms that investigations into findings received prior to August 8 have been concluded. Specifically, it addresses two items: 'Prov 1' (Sample 1), the origin of which was clarified through correspondence with R. Westin of the Research Laboratory at L.K.B. Stockholm, and 'Prov 4' (Sample 4). For the latter, a chemical analysis was performed on slag-like pieces (4:2), ash from shale-like pieces (4:2), and ash from coke-like pieces (4:3). The document provides a table detailing the chemical composition of these samples, specifically measuring the percentages of SiO2, Fe2O3, Al2O3, CaO, and MgO.