Come, Bud,' he used to turn millstones, throw shuttles, work saws and hammers, and drive piles. But every form of power on which Materialism must inevitably split whenever it wants three quarters of the last volume will contain an essay of Mayer's, entitled 'Beitraege zur Dynamik des Himmels,' Heilbronn, 1848; 'Bemerkungen ueber das Mechanische Equivalent der Waerme,' Heilbronn, 1851. ==================== IN MEMORIAM.--Dr. Julius Robert Mayer.