about

Archival Provenance & Public-Domain Boundary

This Digital Scriptorium edition is anchored strictly to 100% Public Domain first printings verified via SHA-256 checksums in resources/growth_and_form/sources_manifest.json and 300 DPI multimodal scan inspection:

1. D’Arcy Wentworth Thompson, *On Growth and Form* (Cambridge: at the University Press, 1917) — First Edition, xv + 793 pages, 17 chapters, 408 figures (LCCN 18001383; Internet Archive ongrowthform1917thom; Project Gutenberg eBook #55264).

2. Jay Hambidge, *The Diagonal* (Vol. I, Nos. 1–12, New Haven: Yale University Press, Nov. 1919 – Oct. 1920) — Original serial publication of The Elements of Dynamic Symmetry (Getty Research Institute digitization diagonal1191unse).

3. Jay Hambidge, *Dynamic Symmetry: The Greek Vase* (New Haven: Yale University Press, 1920) — First book monograph on static vs. dynamic symmetry, sunflower phyllotaxis, root rectangles, and whirling squares (University of Toronto digitization dynamicsymmetry00hamb).

Important

Strict Copyright Exclusion: D’Arcy Thompson’s expanded 1942 Second Edition (whose US copyright runs through 2037) and John Tyler Bonner’s 1961 abridged edition are completely excluded. All 17 chapter headings, inline page milestones (pp. 1–779), figure references, and authorial endnotes derive exclusively from the 1917 Cambridge First Edition.