Euler E057: A physical inquiry into the cause of the ebb and flow of the sea | English translation | OMH v1.0

English translation of “Inquisitio physica in causam fluxus ac refluxus maris” (Eneström E057), titled “A physical inquiry into the cause of the ebb and flow of the sea.” Attribution: Leonhard Euler. This PDF includes the complete original text, pp. 235–350, and all sixteen scientific figures, reproduced from the identified 1760 comparison witness. Prepared for Open Math Heritage with OpenAI-assisted translation, mathematical transcription and LaTeX typesetting. OMH v1.0 is a machine-assisted draft that has undergone a full, fresh independent AI-assisted technical audit of source coverage, translation, formulas, tables and figures where present, and rendered output. This is not a claim of human scholarly review or certification of the historical mathematics. Version 2 is reserved for a fully reviewed edition. Original publication: Paris Academy prize essay for 1740, published 1741, pp. 235–350, with four separate plate leaves. Sources: https://scholarlycommons.pacific.edu/euler-works/57/; https://archive.org/details/b30414167_0003. The figure reproductions come from the Wellcome Library 1760 reprint, whose source-specific metadata carries the Public Domain Mark. The original Pacific scan’s free/open-access statement is not treated as an image-reuse license. Figure-label differences between the witnesses are documented. The historical original is public domain by age; no publication license is assigned here to the new translation or editorial notes.