Sunday, July 21, 2019

Duluth, Minnesota Festival of Steam 2019 Saturday, Part Four


This is the first time I’ve been photographed by a thermal camera; I thought this was one of the neatest things I’ve ever seen.  By examining my photograph I can see that my shirt is an effective thermal insulator of my body heat, yet my German hat is an ineffective thermal insulator for my head.  I wonder why my hat is about the same high temperature as my face.

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