While at Harvard, Hastings was able to arrange for Lowry to work for five months at the Carlsberg Laboratory in Copenhagen, Denmark, where he worked with Kaj Ulrik Linderstrøm-Lang.
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He was an assistant at the Carlsberg Laboratory from 1885 to 1886, and from 1886 to 1891 he taught at the Metropolitan School and the Royal Danish Naval Academy.
While affiliated with Howard University, he received a Guggenheim Fellowship in 1953 and an NSF grant in 1960 that allowed him to travel to the Carlsberg Laboratory in Copenhagen, Denmark, and to ETH Zurich in Switzerland.
Linderstrøm-Lang began in the Carlsberg laboratory under its second director S. P. L. Sørensen (who invented the pH scale).