📖 This early work by Franz Boas was originally published in 1906 and we are now republishing it with a brand new introductory biography. 'The Measurement of Differences Between Variable Quantities' is a treatise on the statistical treatment of biological and psychological measurements. Franz Boas was born on July 9th 1958, in Minden, Westphalia. Even though Boas had a passion the natural sciences, he enrolled at the University at Kiel as an undergraduate in Physics. Boas completed his degree with a dissertation on the optical properties of water, before continuing his studies and receiving his doctorate in 1881. Boas became a professor of Anthropology at Columbia University in 1899 and founded the first Ph.D program in anthropology in America. He was also a leading figure in the creation of the American Anthropological Association (AAA). Franz Boas had a long career and a great impact on many areas of study. He died on 21st December 1942.