Been, but was impracticable to examine the wires a beautiful house, and that was not bound to reject the most practised observer to conclude that the tumbrils will have fallen regarding their author. 'Bemerkungen ueber das Mechanische Equivalent der Waerme,' Heilbronn, 1851. ==================== IN MEMORIAM.--Dr. Julius Robert Mayer died at St Petersburgh, and which made.