Abstract
Calorimetric experiments were conducted to verify the caloric claims by Fleischmann and Pons. A twin‐cell heat conduction calorimeter was used, rather than the quasi‐adiabatic instrumentation of the original investigation. Under similar electrochemical conditions, the output of heat powers from experimental cells of Pd in 
and that from control cells of Pd in 
and Pt in 
were all in close agreement with input heat powers using simple theory. These results show no anomalous "excess" heat as claimed.