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Flat-Earth: central claims

Project: the flat-earth (Zetetic) case in its own words (Rowbotham 1865/1881, Hampden 1869, Carpenter 1885, the Zetetic Society's journal 1893-97, Blount and Smith 1904, Dubay 2015, the Flat Earth Society wiki 2022-23, Rob Skiba 2015-2019), the NASA/Army reports it cites, and mainstream measurements and fact-checks. 103 documents are in facts.json. Statements below are what the documents claim, not verdicts.

Coverage note (not a source gap): the key primary works are readable, and after the QE round most of their experimental content has been deep-read, but not all of it. Rowbotham 1865 was deep-read at PDF pp.160-180 (sea perspective) and pp.68-80 and 103-107 (air-gun, star tubes, sun altitudes, moonlight); the 3rd edition (1881) at Chapter II, Chapters III-V (book pp.62-104) and the wager account; the 1893-97 Zetetic Review (2.1 million characters, 40 chunks) at the non-Bedford items (about 25 pages) and the Bedford-related items (PDF pp.34, 87-88, 175, 204, 216-219, 235, 265); Koresh and Morrow 1898 at the Naples survey (PDF pp.120-195) and the 1896-97 optical tests (PDF pp.83-106); Airy 1856 at PDF pp.2-5, 35-37, 43-47, 58-60; IS-GPS-200N at the clock, rotation and Earth-constant pages. The rest of those works rests on the digests (for the Review, most of its 2.1 million characters). Saved documents in research/files (Westlake's and Carpenter's April 1870 Field letters, Hampden's Field letter, Chambers's Journal 1870, The Zetetic July 1872) are not manifest documents and have not been summarised; only the 26 March 1870 Field report has been read in this round. Most NASA/Army reports were checked by digest and text search for the phrase "flat, nonrotating earth", with five (TM X-2514, RP-1207, CR-4568, CR-62898, PTTI 2007) deep-read. Skiba's videos are YouTube auto-captions, so numbers may be misheard. The README (a finding aid) is marked private and is not evidence.

The central claims

  1. Water is level and the earth shows no curvature. Over miles of water (the Old Bedford canal, 1838 onward; lights and coasts at sea; Chicago across Lake Michigan) distant objects stay visible where the globe rule of 8 inches times miles squared says they should be hidden, so the earth is not a globe of about 25,000 miles circumference. (A variant by the Koreshan survey of 1897 reads the same 8 in x n^2 figure as a concave earth.) Sources: Rowbotham 1865/1881, Carpenter 1885, Dubay 2015, Skiba, TFES Bedford and Sinking Ship pages, Koresh/Morrow 1898. Further flat-side and Koreshan records, all first-person accounts by the interested parties: James Naylor's levelled-instrument repeat of the Old Bedford stretch in August 1894, printed in the Review c.1896 (a railway girder 12 miles away seen over Welney Bridge, no readings in figures; his own printed globe figure of 21 ft above the girder is 38 ft when his 17 ft eye height is included); the Koreshan optical tests of 1896-97 (Summit canal 25 July 1896, Lake Michigan and Roby August 1896, Gordon's Pass to Doctor's Pass and Naples Bay March 1897; targets seen from 4.5 to 6.5 miles with a telescope 2 to 12 in above the water, and a mid-point cross-bar at Naples Bay), for which a globe needs refraction coefficients of roughly 0.5 to 1.0, several times the usual 0.13 to 0.17; the Signal Corps heliograph of 1894 (183 miles, reprinted in the Review). Counter-records in the folder: Wallace 1870 and Oldham 1900-01 (H. Yule Oldham, Cambridge geographer; middle mark about 6 ft above the sight line); Hirt et al. 2010 on variable refraction; the equally spaced three-mark sketches of 5 March 1870 (Carpenter and the referee Coulcher, countersigned in The Field, reprinted in the Review p.265); Jeran Campanella's four-mile light-through-holes test (a flat-side proponent, Behind the Curve, reported in Earth.com: the light was not visible, and the film's account is that this confirmed curvature); and a 1905 Ashby Canal test by Clement Stretton (English Mechanic, 20 January 1905; dip of about 8 inches at one mile, reported only in Wikipedia). General Roy's pickets (Review p.34, second-hand) record refraction changing between afternoon and morning.

  2. The earth is stationary: it neither rotates nor orbits. Foucault pendulums and the Coriolis effect are said to be inconsistent or undemonstrated, and Rowbotham's own experiments are offered as direct proof (an air-gun in 1865, a powder cannon in 1881, fired vertically, whose ball fell back within inches to two feet of the gun in a 16-30 second flight where he predicts a lag of 5,600 to 8,400 ft; two star tubes that show no change after six months), the Michelson-Morley, Sagnac, Airy and Michelson-Gale results are said to show no motion (or to be ambiguous), ring-laser gyroscopes are said to pull a rotation signal out of noise, and the earth's speed (19 miles/s orbital, 1,000 mph rotation) is called absurd. Sources: Hampden, Carpenter, the Zetetic Review ("Our Earth Motionless"), Dubay, TFES Foucault, Coriolis, Airy, Michelson-Gale-Pearson and Ring Laser pages. Counter-records: Foucault 1851, Michelson and Gale 1925 (0.230 +/- 0.005 fringe observed, 0.236 calculated), the NGA WGS 84 and IS-GPS-200 rotation rate (an input to the GPS user equations, from an interested party), the press reports of the Knodel gyroscope drift (Knodel's gyroscope, not Campanella's light test). For the gun tests the deep reader's calculation, not Rowbotham's, is the globe's prediction: a Coriolis drift of about 0.3 m for 16 s and 1.6 m for 28 s at 52 N, which the reported scatter neither confirms nor excludes.

  3. The sun and moon are small and near, and sunrise/sunset are perspective (or curved-light) effects over a plane. Sun and moon about 32 miles across and 3,000 to a few thousand miles up (Rowbotham, Voliva, TFES, Blount and Smith 1904, who add two ether vortices and a figure-8 sun path for the southern sky); sunset by Rowbotham's perspective law, replaced by the "Electromagnetic Acceleration" curving of light on the current wiki. Rowbotham's own height measurements: 1865, Ordnance Survey officers' noon altitudes of 55 deg 18' (London) and 53 deg 2' (Ackworth, 151 mi) and an unnamed Royal Engineers officer's 45 deg and 38 deg over 800 mi, giving a sun under 4,000 miles up (about 2,500 and 2,900 mi on his triangle; the first pair also fits a globe); 1881, London Bridge 61 deg and Brighton 64 deg on 13 July 1870, giving 700 miles and all luminaries within 1,000 miles (the two places' latitudes give an altitude difference of 0.69 deg, not 3 deg). The movement's own writer Naylor conceded in the Review c.1895-96 that sun angles on one meridian "far more nearly correspond with the common theory than with Zeteticism". The Moon is held to be self-luminous because concentrated moonlight shows no heat (Rowbotham 1865, quoting Lardner, De La Hire and Forbes, with one contrary Lancet item of 1856 reporting cooling; Skiba's thermometer test).

  4. Gravity is not a pull from the earth's mass. The earth and the universe accelerate "upward" at a constant 9.8 m/s^2 (Universal Acceleration, TFES), or motion comes from electric/magnetic ether currents (Blount and Smith 1904); Newtonian and relativistic gravity are rejected as incompatible with a flat earth. Measurements in the folder that bear on it: Airy's 1856 Harton Colliery pendulum result (gravity greater at the bottom of a 1,256 ft shaft by 1 part in 19,286, ratio 1.00005185 +/- 0.00000019, a measured value; a mass-free uniformly accelerating floor predicts about 4 x 10^-14) and the IS-GPS-200N relativistic clock offset of -4.4647E-10 (from an interested party; it follows from an inverse-square potential and the orbit, whereas a constant surface g to orbit would give about 2.2E-9).

  5. The shape of the earth is concealed or misrepresented by agencies, and the agencies' own documents show it. NASA, Army and other reports say "flat, nonrotating earth" (listed in the Reddit and Steemit posts); WGS 84 is said to be a flat-map system; space travel is faked (TFES "The Conspiracy", Dubay). Counter-records in the folder: the deep reads of TM X-2514 ("limited ... to application where a flat, nonrotating earth may be assumed"; "short-range, short-duration flights"), RP-1207, CR-4568 (spherical model with flat only as the zeroth-order sub-problem) and PTTI 2007 (flat plane rejected as "too large"); the Lead Stories and AAP fact-checks quoting NASA; the NGA standard.

  6. Scripture describes a flat, stationary, enclosed earth. The Bible never calls the earth round and shows a plane under a dome (Hampden 1869, Skiba Parts 4-9, Voliva, Blount and Smith, Carpenter). This is a theological claim; the physical claims above are tested by the others.

Single-source and interested-party flags

  • The 1870 wager is documented in the folder by the winner (Wallace, 1905), by the loser's referee (Carpenter 1885 and again in the Review in 1894, 24 years after the event, partisan) and by Rowbotham's own account (1881 book pp.268-273, written without his being present). The signed sketches are reproduced in The Field of 26 March 1870 (research/files, read: the referees' views at 3.10 p.m. and 4.30 p.m. on 5 March, countersigned by Coulcher and Carpenter, and the umpire's decision "five feet, more or less") and, second-hand and partisan, in the Review p.265; the Field text is not a manifest document. Rowbotham's own rebuttal (Experimental Proofs, 1870, research/files) is that the agreed three equal discs were not used and that instrument errors including refraction explain the sketches; the Review also prints his turf-boat account of 5 April 1870 (Proctor had conceded that a sight close to the water surface would be decisive).
  • Naylor's 1894 account (Review pp.216-217), the Koreshan optical tests (1896-97) and the Rowbotham gun, star-tube and sun-altitude experiments are each one first-person account by the party that wanted the result: no second account of any of them is in the folder, none gives air or water temperature, and none gives instrument readings in figures except as stated. The gun test and the sun altitudes carry no date, place or named witness.
  • The Koreshan survey (1897) is the work of the colony that wanted its result; witnesses are mostly colony members and the measurement tables are the only data.
  • TFES wiki pages are the Flat Earth Society's own statements; the FlatEarth.ws pages and Answers in Genesis posts are advocacy on the other side; NASA, DMA and NGA documents are by agencies with a stake in the globe model.
  • Rob Skiba's own conclusion (2016-2019) is that his tests are "inconclusive" and the balloon footage was lost; the 2017 balloon result is not reported in the transcripts.

Corrections to earlier documents

  • 1869 Hampden pamphlet: any earlier digest or fact text saying it contains the wager terms, Bedford Level test or an offer of a stake is wrong; it contains none of these (read pp.1-19). The OCR date "1809" is 1869.
  • TFES Ring Laser Gyroscope page: it does not mention Knodel or a 15-degree-per-hour drift (that is in the Earth.com and Kottke press articles) and it does not claim a null RLG result.
  • TFES Michelson-Gale-Pearson page: its mean of +0.26 fringe differs from the paper's 0.230; the OCR "2O" in Table I is 26 observations, so the total 269 is right.
  • Lead Stories 2023: the article does not use the designation "RP-1207"; it names the title and year only.
  • Reddit item 19 (NASA CR-4568) and the AAP/Reddit reading of it: the "flat Earth" passages are the epsilon = 0 sub-problem of a spherical, nonrotating model.
  • Wallace: any statement that he "lost" the stake or never received it is wrong; he received £500 and repaid it in 1876 after Hampden v. Walsh. The TFES claim that a court found he "cheated" is not supported by his own account of the cases and should be checked against the primary record.
  • Rowbotham 1881 preface: the "not entirely satisfactory" admission is in the second-edition preface (24 Sept 1872) reprinted in the 3rd edition and refers to the first edition.
  • QE round (2026-10-10), corrections to earlier digests and facts: (a) the Koresh digest garbles nearly every fraction in PDF pp.84-106 ("14 miles" for 1 1/2, "434" for 4 1/4, "334" for 3 1/2); values in the deep read come from page images. (b) The Earth Review "Parallax Triumphant" letter (p.34) attributes a "20 feet" depression to Coulcher; the held Field report of 26 March 1870 gives no such figure, and the nearest published figure is Wallace's "22 ft in all" (Field, 2 April 1870). (c) Naylor's printed globe figure "21 ft above the girder" omits his 17 ft eye height; the consistent figure is 38 ft at k = 0 (32 ft at k = 0.13). (d) Rowbotham 1881: "Experiment 3" and "Experiment 4" in Chapter III (spring-gun; grindstone) are different experiments from Chapter II's Experiments 3 and 4 (levelling); his 8,400 ft prediction equals 600 feet per second for 14 s, not 600 miles per hour for 28 s (24,640 ft); the 1865 air-gun (16 s, 5,600 ft) and the 1881 powder cannon (28-30 s, 8,400 ft) are told as the same experiment without comment; "circumference 52,800" in the southern-circle argument should read 32,800; the Palmerston letter itself says the ball keeps the earth's motion and the deviations "may ... turn out to be very small". The 1865 star-tube test is written as a proposed experiment, the 1881 version as a reported result. The 1881 sun heights (700 mi) differ from the 1865 ones (under 4,000 mi). (e) Campanella's four-mile light test is a different experiment from Knodel's gyroscope; the Kottke post does not describe it but the Earth.com article in the folder does. (f) IS-GPS-200N: the word "Sagnac" does not occur in the specification; A_REF (26,559,710 m) is in the CNAV section, not on pages 125-128. (g) The Reddit list names 32 items and the Steemit list 15 (largely overlapping); the folder holds 22 of the reports (5 deep-read, 17 checked by phrase search and digest); ten listed items (two CIA, NOAA, IRIG 106-17, NAVAIR and seven ARL reports) are not in the folder. (h) The Oldham of the 1901 BAAS abstract is H. Yule Oldham, M.A., Cambridge geographer, not R. D. Oldham the seismologist.