temperature has been reached upon sealing of the bucket and as indicated by block 196 the fuse is then fired to combust the oxygen within vessel 20 and the sample contained by the crucible contained therein the temperature signals from thermistor 95 are then monitored as indicated by blocks 198 and 200 utilizing a standard thermographic methodology to determine the calorific value of the combusted sample due to the increase in water temperature upon combustion of the sample subsequently seal 33 is deflated by the opening of three way valve 121 and motor 48 is actuated to raise the combustion vessel from the bucket 60 as indicated by block 202 the stirring rate is then increased as indicated by block 204 through motor 90 to again equilibrate the overall isothermal reservoir 71 with the now increased bucket water temperature in preparation for subsequent analysis as necessary cold water from the external chiller 128 is allowed to flow into the jacket so as to refill and cool the jacket water as indicated by block 206 the vessel 20 is then detached vented cleaned drained rinsed and the rate of stirrer 85 is decreased as indicated by block 208 as equilibrium temperature is reached between the water in bucket 60 and jacket volume 71 if additional samples are to be run as indicated by test 210 the procedure beginning at block 170 is repeated if not as indicated by block 212 the jacket temperature can be reduced to a standby mode as indicated by block 214 to disable the pump 100 the.