 Whitehead was up to date with respect to the old quantum mechanics of Planck, Einstein and Bohr. He was as familiar with Jeans’ Report on Radiation and the Quantum-Theory (1914) as with Eddington’s Report on the Relativity Theory of Gravitation (1918). And prior to his departure to Harvard, on 12 July 1924, Whitehead chaired a symposium—“The Quantum Theory: How far does it modify the mathematical, the physical, and the psychological concepts of continuity?”—which was part of a joint session of the Aristotelian Society and the Mind Society. Unfortunately, he did not himself deliver a lecture at that symposium, and the most technical account of his AQT can be found in the student notes of lectures Whitehead gave at Harvard, especially in the fall semester of the academic year 1924–1925. Whitehead’s lectures, however, were not clear-cut presentations, but instances of philosophy in the making. Moreover, his philosophy students lacked the necessary knowledge of mathematical physics to fully comprehend Whitehead when he talked physics. Consequently, the student notes of Whitehead’s Harvard lectures dealing with quantum theory are low quality notes. Ronny Desmet, however, has made a first attempt to correct some of the mistakes and to reconstruct Whitehead’s AQT in his 2020 paper, “Whitehead’s Highly Speculative Lectures on Quantum Theory” (Henning &amp; Petek 2020: 154–181), and in his 2022 paper, “Whitehead’s 1925 View of Function and Time” (to be published).