Tabanus: He was probably abroad in 1900 and 1920 census times.
1910 census 268 Stockton Street Kings Brooklyn NY: Bernhard Blumberg, 49, Russ. Yiddish, immigrated 1888, Real Estate Home office; Yetta Blumberg, 49, Russ. Yiddish, immigrated 1891; Leopold Blumberg, 28, Lawyer, Mayer Blumberg, 25, Lawyer; <Henry Blumberg, 23>, Teacher College
1910: Henry Blumberg, b. <4 July 1886> in Zagar(s)en State, Kovna in Russia, son of Bernhard Blumberg, immigrated July 1891 on board "Augusta Victoria", living in 268 Stockton Street Brooklyn, teacher, intending to go to Germany and return in about 2 years (US passport application dated 10 Sep 1910)
1912: Henry Blumberg, 26, b. <8 July 1886> in Russia , "claims citizenship under Fathers paper", address 268 Stockton Street Brooklyn, arriving in New York 3 Sep 1912 on board "Kronprinzessin Cecilie" sailing from Southampton (NY passenger list)
1913: <Mr Henry Blumberg, A.B. and A.M. (Columbia) and fellow in mathematics 1909-10, continued the study of mathematics in Europe during 1910-12 and last spring passed the public examination for the degree of Ph.D. at Göttingen magna cum laude.> (Columbia University Quarterly, Vol. XV, 1912-13, p. 101)
1914: <The following appointments made by the chancellor were confirmed by the board: ... Henry Blumberg, assistant professor of mathematics> (The Lincoln Daily Star (Lincoln, Nebraska), 7 October 1914, p. 3)
1919: <Taking on nine games of simultaneous chess at 8 o'clock Saturday night at the University club and opening each game with the Queen's pawn, Dr. Henry Blumberg, associate in mathematics, won the entire set in two hours. Dr. Blumberg played all white men. The nine men who were defeated are: R. C. Zuppke, G. A. Huff, A. J. Schuettner, F. L. Stevens, H. S. Grindley, Ernest Bernbaum, H. C. Eckstein, J. B. Shaw and O. H. Moore> (Daily Illini, 6 May 1919, p. 2)
1922: Henry Blumberg, 36, address 810 W. Michigan Ave, Urbaba Ill., arriving in New York 10 Sep 1922 on board SS "Zeeland" from Southampton (NY passenger list)
1930 census 76 Blake Avenue Columbus Ohio: Henry Blumberg, 43, Single, b. in Russia, Yiddish, Immigration year 1891, Professor mathematics State University.
1931: Henry Blumberg, 45, 76 E Blake Ave Columbus Ohio, arriving in New York 11 June 1931 on board SS "Leviathan" from Cherbourg, France (NY passenger list)
1940 census 76 East Blake Avenue Columbus Ohio: Henry Blumberg, 53, Single, b. in Russia, Instructor University; Grace Anderson, 49, Widowed, b. in Ohio, Seamstress at home
1942: Henry Blumberg, 55, 76 E Blake Ave. Columbus Ohio, born <5 - 13 1886> in Zhagori Kovno Russia, Ohio State Univ. Prof. Math., brother of Leopold Blumberg, 32 Broadway NY. (World War 2 Draft Reg. card)
1950: <OSU Professor Dies. Columbus, June 28 - (AP) - Henry Blumberg, 64, professor of mathematics at Ohio State university since 1925, died in his home early today.> (The Lima News, 28 June 1950, p. 3)