The Geology of Central Chile's Long-Lived Volcanic Arc

Discussion of subduction zones that are associated with volcanic arcs and major chemical exchanges between the Earth's surface and underlying mantle.

Methods of Determining Porosity and Spatter Losses of Arc Welds

The original objective of this project was to determine the effect of varying current intensity and electrode coating composition upon the spatter losses and porosity of arc welds made by alternating current. This subject was suggested by the Welding Research Council of the Engineering Foundation, which is a clearing house for welding research in order to avoid du­plication of work.