 Complete the following phrase:  Carl Heinrich Hagen was born into a well connected family of middle-class intellectuals in Königsberg. His father, Karl Gottfried Hagen 17491829 was a distinguished chemist. The novelist Ernst August Hagen was his brother. The physicist-astronomer Friedrich Bessel and the mineralogist-physicist Franz Ernst Neumann became his brothers in law. The royal family were obliged to relocate for several years to the city following 