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Vauxhall Company had 315 cholera deaths per 10,000 houses against 37 for Lambeth — 8.5 times the rate, in the same streets.\",\"hash\":\"a4d6f4bce77267cd4d04ba690a93ccc467035c7b09cd85a4ce79d9865fe5f63f\",\"kind\":\"primary\",\"node\":\"n5973f10d5c54\",\"record\":\"https://hypgraph.com/examples/linked/broad-street\",\"reliability\":\"Snow's comparison of the two south London companies: the result this inquiry repeats.\",\"retrieved\":\"1866-08-01T10:00:00Z\",\"says\":\"Houses supplied by the Southwark and Vauxhall Company had 315 cholera deaths per 10,000 houses against 37 for Lambeth — 8.5 times the rate, in the same streets.\",\"url\":\"https://hypgraph.com/examples/linked/broad-street/#node=n5973f10d5c54\",\"version\":1}"},{"node":"nb9fd0b2c5836","v":1,"at":"1866-08-01T10:00:00+00:00","by":"farr","reason":"","body":"{\"predictions\":[\"Deaths concentrate in the company's district, whatever the district's elevation.\",\"Neighbouring districts on other companies' water are struck far less.\"],\"statement\":\"The epidemic followed the East London Water Company's supply: the water carried it, as it did in south London in 1854.\"}"},{"node":"n9b8e8f3868ab","v":1,"at":"1866-08-01T10:00:00+00:00","by":"farr","reason":"","body":"{\"predictions\":[\"Low districts suffer alike, whichever company supplies them.\"],\"statement\":\"The east end suffered because it is low-lying and crowded: the elevation law.\"}"},{"node":"ndb4859a65bff","v":1,"at":"1866-08-10T10:00:00+00:00","by":"farr","reason":"","body":"{\"aim\":\"Map the epidemic's deaths onto the water companies' districts.\",\"controls\":\"Low-lying districts supplied by other companies.\",\"method\":\"deaths by water supply, district by district\",\"protocol\":\"Take the weekly death returns for each registration district and set beside them the company that supplies it; compare districts of similar elevation on different water.\",\"success_criteria\":\"The deaths follow one supply across elevations, or they follow elevation.\"}"},{"node":"nae360ade06d2","v":1,"at":"1866-08-10T10:00:00+00:00","by":"farr","reason":"","body":"{\"kind\":\"agent\",\"name\":\"Deaths by registration district and water company, 1866\",\"note\":\"Farr's own tabulation for the Registrar General, reported by him (an agent-reported run).\",\"state\":\"succeeded\"}"},{"node":"n5c22b0d312d5","v":1,"at":"1866-09-01T10:00:00+00:00","by":"farr","reason":"","body":"{\"kind\":\"observed\",\"outcome\":\"positive\",\"summary\":\"The deaths were concentrated in the districts supplied by the East London Water Company; low-lying districts on other companies' water were struck far less.\"}"},{"node":"n268db457eeec","v":1,"at":"1866-09-01T10:00:00+00:00","by":"farr","reason":"","body":"{\"kind\":\"observed\",\"outcome\":\"positive\",\"summary\":\"Part of the company's supply came from its reservoirs at Old Ford beside the River Lea, which the inquiry found had let in unfiltered water.\"}"},{"node":"n1c23bd422b62","v":1,"at":"1866-09-01T10:00:00+00:00","by":"farr","reason":"","body":"{\"limitations\":\"Districts, not houses: a district's supply is mostly, not wholly, one company's.\",\"scope\":\"London, the 1866 epidemic, deaths by registration district and supplying company, set beside the 1854 comparison of the south London companies.\",\"statement\":\"The 1866 epidemic in east London followed the East London Water Company's supply, as the 1854 comparison of the south London companies did.\"}"},{"node":"n92e225f2a669","v":1,"at":"1866-10-01T10:00:00+00:00","by":"radcliffe","reason":"","body":"{\"method\":\"My own inquiry into the east London outbreak for the Privy Council.\",\"notes\":\"The deaths follow the company's water; the Old Ford reservoirs are the likely route.\",\"official\":true,\"verdict\":\"checked\"}"}],"edges":[{"id":1,"src":"nb9fd0b2c5836","src_v":1,"rel":"answers","dst":"n132f2f2e7907","dst_v":1,"data":"{}","at":"1866-08-01T10:00:00+00:00","by":"farr","why":""},{"id":2,"src":"n9b8e8f3868ab","src_v":1,"rel":"answers","dst":"n132f2f2e7907","dst_v":1,"data":"{}","at":"1866-08-01T10:00:00+00:00","by":"farr","why":""},{"id":3,"src":"n9b8e8f3868ab","src_v":1,"rel":"alternative_to","dst":"nb9fd0b2c5836","dst_v":1,"data":"{}","at":"1866-08-01T10:00:00+00:00","by":"farr","why":""},{"id":4,"src":"ndb4859a65bff","src_v":1,"rel":"tests","dst":"nb9fd0b2c5836","dst_v":1,"data":"{\"expected\":\"Deaths concentrate in the East London Water Company's district.\"}","at":"1866-08-10T10:00:00+00:00","by":"farr","why":""},{"id":5,"src":"ndb4859a65bff","src_v":1,"rel":"tests","dst":"n9b8e8f3868ab","dst_v":1,"data":"{\"expected\":\"Low districts suffer alike whatever their 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1854.","lifecycle":"active","support":1,"challenges":0},{"id":"n9b8e8f3868ab","code":"H2","type":"hypothesis","title":"The east end suffered because it is low-lying and crowded: the elevation law.","lifecycle":"active","support":0,"challenges":1}],"experiments":[{"id":"ndb4859a65bff","code":"X1","type":"experiment","title":"Map the epidemic's deaths onto the water companies' districts.","preregistered":true,"tests":["H1","H2"],"executed":true,"lifecycle":"active"}],"open":{"claims_unreviewed":[],"claims_contested":[],"claims_stale":[],"results_in_no_claim":[],"experiments_not_preregistered":[]},"spend":{"usd":0.0,"calls":0,"reviews":1,"usd_per_verdict":null,"last_moved":"1866-10-01T10:00:00+00:00","metered":false},"seq":25,"markdown":"## Facts from the research graph — INV1 East London, 1866: the comparison repeated (active)\n_Generated from the record at event 25; do not edit — regenerate it from the graph. Standing is derived by the record's rules, not certified, and none of this is advice (https://hypgraph.com/disclaimer/). Interpretation goes below this section._\n\n### Claims\n\n| claim | standing | review | verdicts | statement |\n|---|---|---|---|---|\n| CL1 v1 | active | checked | radcliffe: checked (RV1, on v1) | The 1866 epidemic in east London followed the East London Water Company's supply, as the 1854 comparison of the south London companies did. |\n\n### Results\n\n| result | outcome | by | carried by a claim | summary |\n|---|---|---|---|---|\n| RS1 | positive | farr | yes | The deaths were concentrated in the districts supplied by the East London Water Company; low-lying districts on other companies' water were struck far less. |\n| RS2 | positive | farr | yes | Part of the company's supply came from its reservoirs at Old Ford beside the River Lea, which the inquiry found had let in unfiltered water. |\n\n### Hypotheses\n\n- H1 (active; support lines 1, challenges 0): The epidemic followed the East London Water Company's supply: the water carried it, as it did in south London in 1854.\n- H2 (active; support lines 0, challenges 1): The east end suffered because it is low-lying and crowded: the elevation law.\n\n### Experiments\n\n- X1 tests H1, H2: preregistered, run — Map the epidemic's deaths onto the water companies' districts.\n\n### Open items\n\n- claims not yet reviewed: none\n- claims contested: none\n- claims on stale evidence (what they rest on has changed since; a check of them no longer counts): none\n- results no claim carries (their conclusions are unreviewed): none\n- experiments not preregistered: none"},"profile":{"id":"","name":"","version":0,"about":"","labels":{"investigation":"Investigation","question":"Question","hypothesis":"Hypothesis","claim":"Claim","experiment":"Experiment","run":"Run","result":"Result","artifact":"Artifact","source":"Source","review":"Review","decision":"Decision","task":"Task"},"vocabulary":{},"workflow":null},"stages":[{"question":"n132f2f2e7907","code":"Q1","profile":"","workflow":false,"stage":"","index":0,"of":0,"complete":false,"next":"no workflow: the profile has no stages (pin an @2 profile)","gates":[]}],"completion":{"investigation":"inv-32fba8a8","profile":"scientific@1","pinned":false,"criteria":[{"name":"questions_settled","met":false,"why":"not settled: Q1"}],"complete":false},"board":[{"id":"n132f2f2e7907","code":"Q1","text":"Why did the 1866 epidemic fall so heavily on east London?","status":"open","by":"","answers":[],"unchecked":[],"unreviewable":[]}],"orders":[]}},"verify":{"ok":true,"checked":25,"head":"ff2ff56cb069f176fe12d3a4ecea6d8db9904af53e13854457cad0821de5a9ae","unchecked":{},"coverage":"complete","policy":{"importer":"importer"}},"at":"1866-10-01T10:00:00+00:00"}}