According to The Book of Dow, published in the 1920's, there was a Henry Herbert Dow b. in Canada 26 Feb 1866. He is described as "of Midland Mich., is manager of Dow Chemical Co., a distinguished chemist. March 16, 1917: Herbert H Dow is making synthetic indigo at the rate of 400 lbs daily."I can provide his ancestry. If you want that, please email me directly.