See: Rothwell, J., *Report on Mizuno's adiabatic calorimetry*. 2014, LENR-CANR.org.
http://lenr-canr.org/acrobat/RothwellJreportonmi.pdf This describes the calorimetry Mizuno is now using in his nanoparticle experiments. He reported on these experiments at ICCF18, and Yoshino described them at MIT. The calorimetry has been improved in recent months. I think it is pretty good. The data for the five tests described in this paper can be downloaded here: http://lenr-canr.org/Mizuno/ - Jed