While I was tweaking my physical object  and physical system classes, I came across the curious result that physical objects were destroyed (the destructor called) twice more than they were created (constructor called).  I don’t understand how or why that is, but the program seems to be working anyway.

I was working on the demonstration for an Array class in my main text, and found an immediate solution for one of the problems in my Physical System class. That doesn’t happen very often.  I have finished the figures for D&D Chapter 7, and in chapter 8 I am again encountering familiar terms that I had not practiced with, so I seem to be learning something, anyway.

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