RATIN O A THEORY 31 



assertion, and in every branch of science there is 

 demand for quantitative measurements. Karl Pear- 

 son, President of the Anthropological Section of the 

 British Association for the Advancement of Science, 

 in an address (1920), said: "I confess myself a firm 

 disciple of Friar Rcger Baccn and of Leonardo da 

 Vinci, and believe that we can really know very 

 little about a phenomenon until we can actually 

 measure it and express its relation to other phenom- 

 ena in quantitative form." 



Pearson has this to say about the wcrk of the late 

 Wilhelm Wundt, who, holding the chair of philosophy 

 at the University of Leipzig, established the first 

 laboratory of psychology: "Wilhelm Wundt's great 

 work runs to ten volumes. But I also know that in 

 its 5,452 pages there is not a single table of numerical 

 measurements, not a single statement of the quantita- 

 tive association between mental racial characters." 



T. Clifford Allbutt maintains: 



"Science consists — as Plato said five centuries be- 

 fore Christ — in measurement." 



Millikan, whose experimental work on the electron 

 (mentioned before) is a synonym for exquisite exact- 

 ness of measurements, concerning quantitative mea- 

 surements, writes: 



"It is only upon such a basis, as Pythagoras 



asserted more than two thousand years ago, that 



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