Abstract: An improved thermally and acoustically insulating structure provides both a high average acoustical transmission loss for incoming sounds of particularly low frequency range and a thermally insulating and anti-dewing effects. The structure includes at least three glass sheets defining air spaces of different width therebetween, the air enclosed in the spaces circulating therebetween through air passages to be kept dry and at least one air space having means to prevent the effect of Newton's rings of beams of light incident on the outer glass sheet.

Abstract: A gasket construction for mounting a plurality of panes or panel members within a frame comprises a gasket member having a one-piece body, and a desiccant material incorporated in the one-piece body. The gasket body has at least one spacer wall section formed integrally therewith to provide a plurality of continuous peripheral grooves for receiving the panel members in parallel, closely spaced planes with an enclosed space formed therebetween. Means are provided for communicating the desiccant material with the enclosed space or spaces to prevent the generation and presence of condensation on the interior surfaces of the panel members.