| Nomination for Nobel Prize in Physiology or Medicine | 
| Year: | 1921 | 
| Number: | 42 - 1 | 
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| Nominee 1: 
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| Name: | Maurice  Arthus | 
| Gender: | M | 
| Year, Birth: | 1862 | 
| Year, Death: | 1945 | 
| Profession: | prof physiology | 
| University: | University of Lausanne | 
| City: | Lausanne | 
| Country: | SWITZERLAND (CH) | 
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| Nominee 2: 
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| Name: | Jacques  Loeb | 
| Gender: | M | 
| Year, Birth: | 1859 | 
| Year, Death: | 1924 | 
| Profession: | prof | 
| University: | Rockefeller Institute for Medical Research (now  Rockefeller University) | 
| City: | New York | 
| State: | NY | 
| Country: | UNITED STATES (US) | 
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| Nominee 3: 
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| Name: | Hartog J Hamburger | 
| Gender: | M | 
| Year, Birth: | 1859 | 
| Year, Death: | 1924 | 
| Profession: | prof physiology | 
| University: | University of Groningen | 
| City: | Groningen | 
| Country: | NETHERLANDS (NL) | 
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| Motivation: | Arthus: Work on poisons and blood coagulation.
Loeb: Work on artificial parthenogenesis.
Hamburger: Work on the isotomy of the blood corpuscles. | 
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| Nominator: 
 | 
| Name: | Charles Robert  Richet | 
| Gender: | M | 
| Year, Birth: | 1850 | 
| Year, Death: | 1935 | 
| Profession: | Nobel Laureate med 1913 | 
| University: | Sorbonne | 
| City: | Paris | 
| Country: | FRANCE (FR) | 
| Awarded the Nobel Prize in Physiology or Medicine 1913 | 
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