(It appears that my list of the RadLab books came from:
This link no longer works but:
Does and I did get volume 11 from there.
At MIT, I find a page about the series, but not the texts of the volumes:
)
In the second above, page 81 mention is made of “bolometers”, being
implemented with thermistors and bolometer, these having negative and
positive temperature coefficients. It goes on to describe bridge circuits and
the characteristics of the measurement elements.
There's a copy of the Rad Lab series on ko4bb.com:
-- john, KE5FX