The sub-title of this symposium is accurate and, in a curious way, promises more than it states: Classical Physicist, Modem Philosopher. Heinrich Hertz, as the con- summate experimentalist of 19th century technique and as brilliant clarifying critic of physical theory of his time, achieved one of the fulfilments but at the same time opened one of the transition points of classical physics. Thus, in his 'popular' lecture 'On the Relations Between Light and Electricity' at Heidelberg in the Fall of 1889, Hertz identified the ether as henceforth the most fundamental problem of physics, as the...

The Invisibility of Chemistry DAVIS BAIRD South Carolina Honors College, University of South Carolina ERIC SCERRI Department of Chemistry and Biochemistry, University of California, Los Angeles LEE MCINTYRE Center for Philosophy and History of Science, Boston University BUTWHATAREALLTHOSECHEMISTSDOING? Recently, one of us (Davis Baird) attended a meeting of historians of science and technology spanning all of the natural sciences and engineering and all (western) periods, ancient through contemporary. In the discussion of a paper on state-of-t- art history of modern (18th century forward)...

The sub-title of this symposium is accurate and, in a curious way, promises more than it states: Classical Physicist, Modem Philosopher. Heinrich Hertz, as the con- summate experimentalist of 19th century technique and as brilliant clarifying critic of physical theory of his time, achieved one of the fulfilments but at the same time opened one of the transition points of classical physics. Thus, in his 'popular' lecture 'On the Relations Between Light and Electricity' at Heidelberg in the Fall of 1889, Hertz identified the ether as henceforth the most fundamental problem of physics, as the...