 In the subsequent chapter dealing with qualitative changes, Heytesbury expresses the same concerns. He takes part in the debate over one of the most widely discussed problems in the fourteenth-century philosophy of nature focused on the possible “measure” of the intension and remission of forms. Like most of the Oxford Calculators, Heytesbury accepts Scotus’s and Ockham’s addition theory and assumes that the intension of form is the result of adding qualitative parts. As an Ockhamist, Heytesbury emphasizes that the term “motion” in alteration connotes nothing else than the degrees or latitude of quality that are successively acquired. A basic assumption is that qualitative intensity is a certain kind of linearly ordered and additive quantity. Thus, as in the case of local motion, Heytesbury divides the latitudes of motion of alteration into the latitude of motion of intension and the latitude of motion of remission; and the latitude of the latitude of motion into the latitude of the acquisition of the latitude of motion and the latitude of the loss of latitude of motion. In modern terminology, these latitudes correspond to latitudes of speed and of acceleration and deceleration, respectively. Since there is no limit to speeds of alteration nor to rates of acceleration or deceleration of that speed, those latitudes are all infinite.