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How Coumadin was discovered - From Poison to Coumadin - by Dr Callahan
DrCallahan
2,791 views
Dr Callahan talks about the discovery of Coumadin
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Founding Fathers and the American Revolution_Part2 by Dr Callahan
DrCallahan
914 views
Dr Callahan continues his talk on the Founding Fathers ....See all of Dr Callahan's videos search 'drcallahan' (no spaces)
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Founding Fathers and the American Revolution_Part1 by Dr Callahan
DrCallahan
2,709 views
Dr Callahan talks about the Founding Fathers and their role in the American Revolution - see all of Dr Callahan's videos search 'drcallahan' (no spaces)
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History of Words - Part2 by Dr Callahan
DrCallahan
306 views
Dr Callahan continues his talk on the history of words- see all of Dr Callahan's videos search 'drcallahan' (no spaces)
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The History of Words - Part1 by Dr Callahan
DrCallahan
835 views
Dr Callahan talks about the history of words- see all of Dr Callahan's videos search 'drcallahan' (no spaces)
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The History of Political Slogans by Dr Callahan
DrCallahan
683 views
Dr Callahan talks about the history of political slogans- see all of Dr Callahan's videos search 'drcallahan' (no spaces)
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How General Lee saved the 19th Century - Part2 by Dr Callahan
DrCallahan
575 views
Dr Callahan continues his talk on how Gen Lee saved the union- see all of Dr Callahan's videos search 'drcallahan' (no spaces)
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How General Lee saved the 19th Century_part1 by Dr Callahan
DrCallahan
1,039 views
Dr Callahan talks about General Lee and how he saved the Union- see all of Dr Callahan's videos search 'drcallahan' (no spaces)
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Terrorists, Fighting Songs and John Brown by Dr Callahan
DrCallahan
776 views
Dr Callahan talks about terrorist and their fighting songs and the Civil War song that praised John Brown- see all of Dr Callahan's videos search 'drcallahan' (no spaces)
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General Lee vs General Grant - Part3 by Dr Callahan
DrCallahan
1,188 views
Dr Callahan concludes his talk about Gen Lee and Gen Grant- see all of Dr Callahan's videos search 'drcallahan' (no spaces)
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