Full Idea
It is essential to a quantitative domain of any kind that there should be an operation of adding its elements; that this is more fundamental thaat that they should be linearly ordered by magnitude is apparent from cyclic domains like that of angles.
Gist of Idea
Addition of quantities is prior to ordering, as shown in cyclic domains like angles
Source
Michael Dummett (Frege philosophy of mathematics [1991], 22 'Quantit')
Book Reference
Dummett,Michael: 'Frege: philosophy of mathematics' [Duckworth 1991], p.279
Related Idea
Idea 18256 Quantity is inconceivable without the idea of addition [Frege]