Publisher's Synopsis
Excerpt from The Texas Mathematics Teachers' Bulletin, Vol. 14: May 22, 1930
In arithmetic 35. In arithmetic numbers have no signs, they are neither positive nor negative. In algebra when we bring positive and negative numbers into use it is customary to regard the familiar numbers of arithmetic as positive numbers. This being true, it is natural enough to say that +35. We express this in words by saying that the product Of two positive numbers is posi tive. What then shall we say is the product Of 7)
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