Variable-volume atomic storage vessel for hydrogen masers

Vessel, located in maser cavity, is made from cylindrical, convoluted flexible bellows which can be expanded or contracted along the cylinder axis vertically. Inner surface area remains constant with changing volume, permitting measurement of frequency deviations of excited atoms

After Eden: facing the challenge of gender relations

Reviewed Book: Van Leeuwen, Mary Stewart. After Eden: facing the challenge of gender relations. Grand Rapids: Eerdmans; Carlisle, Eng: Paternoster Press, 1993