The problematic unity of biometrics.
The word "biometry" may be less than 200 years old, but it can be argued that work we would now consider biometric dates back even to the pre-Christian era. The unity of biometry is attested through examples spanning two millennia, and a lesson from Francis Galton is recalled from a century ago.
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D001699:Biometry / Q000266:history; D002986:Clinical Trials as Topic / Q000266:history; D049672:History, 19th Century; D049673:History, 20th Century; D049690:History, Ancient; D049691:History, Medieval; D006801:Humans; D016013:Likelihood Functions; D015233:Models, Statistical; D010506:Periodicals as Topic / Q000266:history; D011336:Probability