Historical happenings

7/15/1806 ~ Zebulon Pike begins his journey to explore the American Southwest

7/15/1830 ~ Indian tribes, Sioux, Sauk & Fox, sign fourth Treaty of Prairie du Chien giving the US most of Minnesota, Iowa & Missouri

7/15/1940 ~ Physicist Donald Kerst becomes the first person to accelerate electrons using electromagnetic induction, reaching energies of 2.3 MeV, when his betatron device (for particle acceleration) becomes operational

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