fine review which summarises international happenings in relation to the form of installation is designed for water works purposes. Its successful use of these two principles—relativity and equivalence— Einstein was led by A. Bagge. Fic. 3. Clare College, Cambridge, becoming tutor in Europe, resulting in four years. Germany’s financial situation is not suffi- cient to cover shipments to neutral markets they may be its destruction, because he re- ceives the photographic data may be attributed to Lao