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      "statement": "# Michelson and Gale: effect of Earth rotation on the velocity of light, Part II\n\nUsed a large rectangular interferometer to compare oppositely directed light paths and measured the phase displacement associated with Earth's rotation.\n\n## Scientific scope\n\nThe record is the exact Part II experimental paper by Michelson and Gale. Fred Pearson is retained as an explicitly credited assistant, not promoted into the byline; Part I theory, Sagnac's earlier experiment and later gyroscopes remain separate.\n\n## Reading status\n\nThis is a source-linked WRS catalogue note. A full explanatory guide and independent scientific reconstruction have not been completed for this entry. Read the identified original work for its complete narrative and arguments.\n\n## People and systems\n\nAlbert A. Michelson; Henry G. Gale\n\nThe named authors contributed to this scoped work; individual effort shares and later applications are not assigned by the byline.\n\n\n\n## Original sources\n\n- [Astrophysical Journal record for Michelson-Gale Part II](https://doi.org/10.1086/142878)\n- [Nature report on the Michelson-Gale Earth-rotation experiment](https://doi.org/10.1038/115566a0)\n",
      "summary": "Used a large rectangular interferometer to compare oppositely directed light paths and measured the phase displacement associated with Earth's rotation.",
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    "title": "Michelson and Gale: effect of Earth rotation on the velocity of light, Part II",
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        "title": "Michelson and Gale: effect of Earth rotation on the velocity of light, Part II",
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