The Puck (Mrzezino) hoard and procedures of the Prussian Monarchy towards coin finds. Treasure legislation in the Prussian monarchy shared hoards between the finders and the owners of the ground. This regulation produced archival evidence dating back to the eighteenth century. The large gold hoard, found in what is nowadays Mrzezino in northern Poland in 1795, was reported to Berlin shortly after its discovery. In the beginning, mainly juridical questions were discussed, but in 1798, this moved to the discussion of what to do with the coins and where and to whom they should be sold. The archival reports reveal that the coins were mainly of Anastasius, some of Zeno’s and only a few of Leo, Basiliscus and Theodosius and, as their value was above intrinsic value, they were sold to the royal collection in Berlin as well as to collections in Prussia and Poland.

Sound joint of hollow-extruded 6005A-T6 aluminum alloy was achieved by friction stir welding and its high cycle fatigue performance was mainly investigated. As a result, the joint fatigue limit reaches 128.1 MPa which is 55% of the joint tensile strength. The fatigue fracture mainly occurs at the boundary between the stir zone and thermo-mechanically affected zone due to the large difference in the grain size. This difference is caused by the layered microstructure of the base material. The shell pattern with parallel arcs is the typical morphology in the fracture surface and the distance between arcs is increased with the increase of stress level. The specimen with the fracture located in the stir zone possesses a relatively low fatigue life.