He was educated at Utrecht and The Hague High School and King's College, Cambridge. His main work focused on the study of alkaloids and investigations of simple nitrogenous compounds of biological importance. Barger identified tyramine as one of the compounds responsible for the biological activity of ergot extracts. He also made significant contributions to the synthesis of thyroxine. and vitamin B1
Barger was married to Florence Emily Thomas in 1904 and had two sons and one daughter.
- Regius professor of chemistry, University of Glasgow, 1937–1939
- Professor of chemistry in relation to medicine, University of Edinburgh, 1919–1937
- Professor of chemistry, Royal Holloway College, University of London, 1913–1914
- Head of Chemical Department, Goldsmiths' College, 1909–1913
- Fellow of King's College, Cambridge, 1903–1909
- Some Applications of Organic Chemistry to Biology and Chemistry (1930)
- Organic Chemistry for Medical Students (1932)
- Former Fellows of The Royal Society of Edinburgh 1783 – 2002. royalsoced.org.uk
- "Barger, George (BRGR897G)". A Cambridge Alumni Database. University of Cambridge.
- Harington, C. R.; Barger, G. (1927). "Chemistry of Thyroxine: Constitution and Synthesis of Thyroxine". The Biochemical Journal. 21 (1): 169–183. doi:10.1042/bj0210169. PMC . PMID 16743801.
- Percival, E. G. V.; Jordan, L. A. (1947). "Obituary notices: Joseph John Blackie, 1895–1946; Robert Selby Morrell, 1867–1946". J. Chem. Soc.: 432–433. doi:10.1039/JR9470000432.
- Dale, H. H. (1940). "George Barger. 1878-1939". Obituary Notices of Fellows of the Royal Society. 3 (8): 63–26. doi:10.1098/rsbm.1940.0006.
- "Library and Archive Catalogue". Royal Society.
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- Britons discover synthetic thyroxin, T.R. Ybarra, New York Times, Sunday 12 December 1927