Physical Society Exhibition: Brief Notes on a few of the Exhibits shown at the Exhibition held on March 24–27, 1958

Portsdown, Hants Two materials for absorbing microwave radiations were shown. Glass fibre cloth impregnated with colloidal graphite is found suitable for experimental medium power matched terminations. The surface resistivity can be altered within wide limits, and over 100 db/m absorption is obtained when inside walls of x‐band waveguide are lined with the material. Cooling through the waveguide walls is rapid.