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Published online by Cambridge University Press: 03 November 2016
1. Whence these “products”? Why one a scalar (actually a real number—see below) and the other a vector? These are interesting questions, if once we shake ourselves free from inherited knowledge of the facts and become curious as to the why and the wherefore.
page 262 note * In each of these, as in other similar, cases, the proposition is a definition of the precise use of the term “product” in the context in question—based on the physical facts of a relationship expressible by the “product” relationship between the pure vectors which are measures of the physical quantities in question.