Just a little FYI here.  A fine discussion of phlogiston theory and its
replacement by the oxygen hypothesis can be found in Paul Thagard's
_Conceptual Revolutions_.  Thagard covers all sorts of conceptual
changes in science.  (I reviewed this book several years ago for _Full
Context_.  My review is available online at
http://uweb.superlink.net/neptune/Concept.html) Also, he's on the web at
http://cogsci.uwaterloo.ca/Biographies/pault.html
That's more of what we need to know here: How hypotheses and concepts
change in science.
Happy Holidays!
Daniel Ust
http://uweb.superlink.net/neptune/
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