Jon Finch has given that presentation in the past, even before last July's Saturday Excursion. He has posted quite a lot about chemistry in the past. If you're interested to know what Jon has taught us in the past, do a search. I just did this and it came up with a lot of good information that I believe probably covers more than what he said at the November meeting. (I couldn't make it to the meeting but didn't miss seeing my old friend on July 11.
Search the keyword "chemistry" by member name "jfinch" in "All Forums". Also select Find Posts "Last 6 Months" - "and Older".
Aloha,
Mark
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