REFERENCES
- 1. H. Kamerlingh Onnes , Proc. R. Netherlands Acad. Arts Sci. (KNAW) 11, 168 (1909).
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- 9. Ramsay to Kamerlingh Onnes, 19 July 1905, Archives of Heike Kamerlingh Onnes, Museum Boerhaave, Leiden, the Netherlands.
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- 12. Dewar to Kamerlingh Onnes, 5 January 1904, Archives of Heike Kamerlingh Onnes, Museum Boerhaave, Leiden, the Netherlands.
- 13. See www.museumboerhaave.nl.
- 14. Correspondence between B. Boltwood, H. Miner, and H. Kamerlingh Onnes can be found in the archives of the Leiden Institute of Physics, the Netherlands.
- 15. R. G. Scurlock , ed., History and Origins of Cryogenics, Clarendon Press, Oxford, UK (1992).
- © 2008 American Institute of Physics.

