Copper cylinder of the experimental engine at the Conservatoire des

The copper cylinder of the experimental engine at the Conservatoire des Arts et Métiers remained cool to the touch at noon on May 14. Steam pressure had reached four atmospheres, yet the piston moved with a lethargy that defied the calculated expansion of the gas. Heat seeks its equilibrium with a persistence that cannot be hurried by the observer. The fire in the furnace represents the hot reservoir; the atmosphere of the workshop acts as the condenser. Between these two temperatures, a motive power must be produced. If the motion is absent, the caloric is not disappearing; it is merely accumulating within the metal walls, waiting for the gradient to overcome the internal friction of the machine.

The 915MHz microwave emitter functions as a high-temperature source directed at the cellular mass. In this configuration, the sarcoma serves as the boiler. The objective is to elevate the internal temperature of the tissue to 42°C while the surrounding body remains the cold reservoir. The efficiency of this thermal transfer is governed by the survival ratio. A 42% increase in survival suggests that the gradient is sufficiently steep to do work upon the malignancy without exhausting the capacity of the patient’s system to dissipate the waste heat.

The thermometer indicates 40.5°C. The process requires another twenty minutes of sustained radiation to reach the threshold. To accelerate the flux by increasing the power would risk an irreversible transformation - the destruction of healthy tissue through an uncontrolled rise in the floor of the cold reservoir. The motive power of the treatment depends entirely on the maintenance of this 5°C differential. A premature measurement provides a false ratio. The engine must be allowed to complete its cycle. The heat must flow from the emitter, through the tumor, and into the vascular condenser at a rate that allows the accounting of every calorie. Patience is the recognition that the maximum theoretical efficiency of any system is limited by the temperatures of the two bodies between which the heat is transported. The mercury rises one tenth of a degree every three minutes. The experiment will continue until the 42°C limit is achieved.