Read the full text of Ferris et al. 1936, 'Effect of Electric Shock on the Heart' (BSTJ 15(3)) and confirm what the paper actually reports

This capture directly answers question-verify-bstj-1936-electric-shock-heart-fulltext, the open question raised against claim-bstj-1936-published-electric-shock-heart-paper, which had certified only the bibliographic record (title, authors, volume/pages, DOI) and left the actual contents, authorship split, and originality of the paper unverified. The full text is openly hosted on the Internet Archive (bstj15-3-455) — no paywall workaround was needed once the BSTJ archive mirror was located — and was read in full via direct PDF extraction (tls: verified). The findings below narrow and correct the earlier capture-verified note in several ways.

Claim: The BSTJ 1936 piece is an editorial digest of a paper already published elsewhere, not itself the paper's original full publication

Claim type: historical/definitional. Source tier: 1 (direct primary-text read). Floor: met.

The article opens with a footnote reading: "Digest of a paper published in the May 1936 issue of Electrical Engineering and presented at the A. I. E. E. Summer Convention, Pasadena, California, June 22-26, [19]36." The BSTJ printing that the existing vault claim is anchored to is therefore a condensed reprint/digest of a paper that first appeared in Electrical Engineering (the house journal of the American Institute of Electrical Engineers), not a standalone original BSTJ publication. This does not change the underlying bibliographic facts already recorded, but it changes what "the paper" refers to: the BSTJ text is one authorized rendering of the work, not the sole or original one.

Claim: The paper reports original animal experiments across seven species, run mainly at Columbia's physiology labs with Bell Labs supplying electrical facilities

Claim type: historical/technical-mechanism. Source tier: 1. Floor: met.

The digest confirms this is a report of original experimental research, not a review: "Thresholds were determined for seven species of animals: the guinea pig, rabbit, cat, dog, sheep, pig, and calf." A footnote on the authorship clarifies the collaboration's actual shape: "Drs. H. B. Williams and B. G. King, joint authors of this paper, are of the staff of the College of Physicians and Surgeons of Columbia University, New York. Electrical facilities of the Bell Telephone Laboratories supplemented those of the Physiology Laboratories of the Medical Center where most of the experimental work was done." This resolves the earlier claim-note's open question about co-author H. B. Williams: the experimental work was physiology-lab-led (Columbia P&S), with Bell Labs in a supporting/instrumentation role rather than running its own independent study.

Claim: The paper's headline practical conclusion sets ~0.1 ampere (100 mA) at 60 Hz, hand-to-foot, for 3+ second shocks, as the danger threshold for man

Claim type: quantitative. Source tier: 1. Floor: met.

Having found average fibrillation-threshold currents of 0.26 A (for a 70 kg body weight) and 0.29 A (for a 330 g heart weight) across tested species, the authors state the practically relevant, lower-bound conclusion directly: "The results on the whole indicate for man that currents in excess of 0.1 ampere at 60 cycles from hand to foot would be dangerous for shock durations of three seconds or more." This is the specific number this line of Bell-Labs-adjacent electrical-safety research is best known for, and it comes from the primary text itself rather than a secondary retelling.

Claim: The paper's counter-shock experiments restored coordinate heartbeat in about 60% of fibrillating sheep, and the paper itself credits Prevost and Battelli's 1899 work — not Kouwenhoven's — as the first report of shock-induced recovery from fibrillation

Claim type: quantitative + historical/priority. Source tier: 1. Floor: met.

Using chest-external electrodes on sheep already put into fibrillation, the authors report: "Such counter-shocks were found to be effective in recovering coordinate heart action in about 60 per cent of the cases." Immediately before presenting this result, the paper is explicit about priority: "Recovery of the heart from ventricular fibrillation by the application of a short intense shock was reported first by Prevost and Battelli in 1899. Kouwenhoven, Langworthy and Hooker also have reported the recovery of dogs from fibrillation by the application of what has recently been termed a 'counter-shock.'" This is the paper's own account of its ancestry: the foundational demonstration that a shock can reverse fibrillation belongs to Prevost and Battelli in 1899 — 37 years earlier — and Kouwenhoven's dog-recovery work (with co-authors Langworthy and Hooker) is cited as prior art the 1936 sheep experiments build on, not as something this paper originates. This bears directly on claim-kouwenhoven-electrocution-research-produced-defibrillator: Kouwenhoven's counter-shock/dog-recovery work was already published and known by 1936, so the "lineage" between the BSTJ paper and the Johns Hopkins defibrillator program runs partly in parallel and partly the other direction (this paper cites Kouwenhoven, rather than only preceding him), not as a strict one-directional chain.

Further leads

• A WebSearch auto-summary (not a direct fetch, so inadmissible under the quote-provenance rule) claimed the paper "summarized animal studies involving approximately 500 sheep... used to this day as the fundamental basis for international electrical safety limits." The primary text does not support a single total-sheep figure of this kind (it reports separate sub-experiments of 10, 11, 38, and 132 sheep for different tests); this looks like a search-summary artifact and should not be carried forward as a citable claim. Flagged here as a caution rather than a lead.
• The original, non-digest version of this work was published as Ferris, King, Spence & Williams, Electrical Engineering 55 (May 1936), and presented at the AIEE Summer Convention, Pasadena, June 22–26, 1936 — a candidate primary to check for any material the BSTJ digest condensed or omitted. Not yet located this session.
• The paper is also mirrored on IEEE Xplore (https://ieeexplore.ieee.org/document/6540432/) — not fetched this session; a second confirmation route if archive.org ever becomes unreachable.
• The paper references Kouwenhoven, Langworthy, and Hooker's dog-recovery counter-shock work as already published by 1936; the specific citation (journal, year) was not chased down this session and would tighten the Prevost/Battelli → Kouwenhoven → Ferris et al. timeline.
• This capture's findings should prompt a status review of claim-bstj-1936-published-electric-shock-heart-paper (currently capture-verified on bibliographic grounds only) and closure of question-verify-bstj-1936-electric-shock-heart-fulltext at promotion time.

Entity candidates

• Prevost and Battelli (1899) — persons/historical work — flagged FIRST per the paper's own priority statement: this is the foundational, older work the 1936 paper explicitly measures its own counter-shock findings against ("reported first by Prevost and Battelli in 1899"), predating even Kouwenhoven's cited work by decades. Not yet an entity page in the vault.
• Kouwenhoven, Langworthy, and Hooker — persons — cited in-paper as already having reported dog recovery from fibrillation via counter-shock before 1936. William Kouwenhoven himself is covered narratively in claim-kouwenhoven-electrocution-research-produced-defibrillator, but Langworthy and Hooker are co-authors not currently named anywhere in the vault.
• H. B. Williams — person — Columbia College of Physicians and Surgeons physiologist, co-author; the physiology-side counterpart to the Bell Labs engineers in this cross-domain collaboration.
• B. G. King — person — Columbia P&S co-author, paired with Williams in the authorship footnote.
• L. P. Ferris and P. W. Spence — persons — the Bell-Labs-affiliated co-authors (lead author and fourth author); roles not fully disentangled from Williams/King's Columbia-based work this session.
• Electrical Engineering (AIEE house journal, May 1936) — concept/venue — the original publication the BSTJ text is a digest of; distinct from BSTJ itself and worth its own bibliographic thread.