William Robert Grove was a Welsh physical scientist, judge and lawyer. He was particularly devoted to his scientific work and gained considerable praise for his research projects within that field. His ‘On the Correlation of Physical Forces’, published in 1846, is considered a literary classic. In this volume Grove explains the principle of the conservation of energy. It is worth noting that his work was published a year prior to that of Herman von Helmholtz, a German physicist who also enunciated the above principle in his famous thesis 'Über die Erhaltung der Kraft’ (“On the Conservation of Force”).