Horace, you seem to be saying that the condenser was air-cooled instead of water-cooled. Of course this would introduce major errors, and it still doesn't address the issue of tritium.
Only if it had been water cooled could all the heat be accounted for, and that is why I assumed it was water cooled and that the thallium was turning up in the second circuit. > This is a very important comment. It means that boiloff calorimetry can be very suspect without proper controls. Yes, proper controls like a second circuit with dual calorimetry. > A radioactive tracer would be good in labs equipped to handle them. Not unless the possibility of tritium can be eliminated, or unless your tracer has a far more energetic signature than tritium. Thallium is just too close IMHO. After all, your are doing cold fusion. Cold fusion often produces tritium. Isn't the cross-connection obvious? BTW even though tritium "normally" has a significant spread of energy, can we be sure that tritium produced via CF is not closer to being mono-energetic? Jones