Gravity waves, while predicted by theory for decades, have been notoriously difficult to detect.

we covered the rutted, rattling, dusty pot-holed roads of coastal Victoria, six big Walers in front, the cannon at the rear, and that unsprung cart they called a ‘limber’ in the middle.

More than a day of rest, Sunday was a cementer of relationships, a soother of the mind, a comfort to the body and an elixir for the soul.

Pyrazine, aldine, C₄H₄N₂ (colourless prisms, M. Pt. 55°, B. Pt. 115°), possesses a basic character (B. 26, 721) and is the mother substance of the ketines, e.g. Ketine or dimethyl-pyrazine, C₄H₂ (CH₃ )₂ N₂, which is obtained by the reduction of isonitroso-acetone or the condensation of amido-acetone (p. 157; B. 19, 2524; 21, 19).