Merewether Report
Executive Summary
The Merewether-Price Report of 1930 was the first systematic epidemiological study to prove that asbestos dust causes lung disease. Written by Dr. E.R.A. Merewether (His Majesty's Medical Inspector of Factories) and C.W. Price (HM Engineering Inspector of Factories), the report examined 363 asbestos textile workers in British factories and found that 26.2% had definite pulmonary fibrosis — the condition now known as asbestosis.[1] Among workers with 20 or more years of exposure, the rate reached 80.9% (17 of 21 workers).[2]
The report was commissioned by the UK Home Office following the 1924 death of Nellie Kershaw, a Turner Brothers asbestos textile worker whose case became the first officially attributed to asbestosis.[3] Merewether and Price's findings led directly to the Asbestos Industry Regulations 1931 — the world's first regulatory framework specifically governing asbestos exposure in the workplace.[4]
The report's significance extends far beyond 1930s Britain. Internal corporate documents later revealed that major asbestos manufacturers — including Johns-Manville in the United States — received copies of the Merewether-Price findings but chose to suppress the information rather than protect their workers.[5] This corporate knowledge became central evidence in asbestos litigation decades later, proving that the industry knew asbestos was lethal and concealed it for profit.
At-a-Glance
Merewether-Price Report at a glance:
- 363 workers examined in British asbestos textile factories during 1928–1929 — the first systematic study of asbestos disease[1]
- 26.2% overall asbestosis rate — 95 of 363 current workers had definite pulmonary fibrosis[2]
- 80.9% rate in long-term workers — 17 of 21 workers with 20+ years exposure had asbestosis[2]
- 0% in short-term workers — none of the 89 workers with under 5 years exposure showed disease[2]
- 9 months minimum exposure to develop asbestosis — far shorter than previously expected[6]
- Survivorship bias acknowledged — the study examined only current workers; those who had already left or died were excluded, meaning the true disease rate was higher[6]
- World's first asbestos regulations — the findings led directly to the UK Asbestos Industry Regulations 1931[4]
- Corporate knowledge proved — Johns-Manville and other manufacturers received copies but suppressed the findings for decades[5]
Key Facts
| Measure | Finding |
|---|---|
| Workers Examined | 363 asbestos textile workers from an estimated 2,200 exposed workers in Britain[2] |
| Overall Asbestosis Rate | 26.2% (95 of 363) — definite pulmonary fibrosis[2] |
| 0–4 Years Exposure | 0% (0 of 89 workers) — no cases of fibrosis[2] |
| 5–9 Years Exposure | 25.5% (36 of 141 workers)[2] |
| 10–14 Years Exposure | 28.6% (24 of 84 workers)[2] |
| 15–19 Years Exposure | 64.3% (18 of 28 workers)[2] |
| 20+ Years Exposure | 80.9% (17 of 21 workers) — four out of five had asbestosis[2] |
| Minimum Exposure for Disease | 9 months — asbestosis detected after less than 1 year of exposure[6] |
| Average Fatal Exposure Duration | 15.2 years (from Merewether's 1933 follow-up in Tubercle)[6] |
| Legislative Result | Asbestos Industry Regulations 1931 — first asbestos-specific workplace regulations in the world[4] |
What Prompted the Investigation?
The Merewether-Price investigation did not arise from routine factory inspection. It was triggered by a single death.
In 1924, Nellie Kershaw, a 33-year-old woman who had worked at Turner Brothers' asbestos textile mill in Rochdale, Lancashire, died of pulmonary fibrosis. Dr. William Edmund Cooke performed the autopsy and identified asbestos fibers in her lungs, publishing his findings in the British Medical Journal in 1924.[3] Kershaw's death was the first officially attributed to asbestosis, though the disease had been observed as early as 1906 when H. Montague Murray documented it in a Charing Cross Hospital postmortem.[7]
Turner Brothers denied responsibility for Kershaw's death and refused to compensate her family. But her case prompted the Home Office to commission a formal investigation. Dr. E.R.A. Merewether, His Majesty's Medical Inspector of Factories, was assigned the medical component. C.W. Price, HM Engineering Inspector of Factories, was assigned to measure dust levels and assess engineering controls.[6]
What Did the Report Find?
Merewether examined 363 workers at asbestos textile factories across Britain during 1928–1929, including mills at Rochdale (Turner Brothers), Trafford Park, and facilities operated by Cape Asbestos Company. These 363 represented a subset of an estimated 2,200 British workers exposed to pure or nearly pure asbestos dust.[2]
The results were stark. Overall, 95 of 363 workers (26.2%) had definite pulmonary fibrosis caused by asbestos dust. The disease rate increased dramatically with duration of employment: zero cases among workers with under 5 years of exposure, rising to 80.9% among those with 20 or more years.[2] As commonly stated: four out of five long-term asbestos workers had asbestosis.
Merewether recognized a critical limitation in his own data. He had examined only current workers — those still employed at the time of his investigation. Workers who had already become too sick to work, or who had died, were not counted. This survivorship bias meant the true disease rate was almost certainly higher than 26.2%.[6]
Price's engineering assessment complemented the medical findings. Using the Owens jet dust counter — the British standard instrument for industrial dust measurement — he documented dust concentrations at worker breathing height and found levels far exceeding what would later be recognized as safe. The factories had no meaningful ventilation, no dust suppression, and no respiratory protection for workers.[6]
What Regulations Did the Report Produce?
The Merewether-Price findings led directly to the Asbestos Industry Regulations 1931 — the first asbestos-specific workplace regulations anywhere in the world. The regulations required:[4]
- Mechanical ventilation and dust extraction in designated asbestos processes
- Medical examination of asbestos workers
- Notification of asbestosis cases to the Chief Inspector of Factories
- Asbestosis added to the schedule of compensable industrial diseases
The regulations were a landmark but also deeply flawed. They applied only to "scheduled processes" — the dustiest operations like crushing, spinning, and weaving — and excluded workers in construction, shipbuilding, and installation who handled asbestos products daily.[6] The regulatory committee that drafted the rules included representatives from asbestos manufacturers, including Cape Asbestos Company, who shaped the regulations to minimize industry burden.[6]
The 1931 regulations remained the primary UK framework for asbestos regulation for over 30 years, receiving only minor updates until the Asbestos Regulations 1969.
What Did the Asbestos Industry Do With These Findings?
The Merewether-Price Report was a public document, laid before Parliament and published by His Majesty's Stationery Office. It was not secret. Major asbestos manufacturers around the world received copies and understood the implications.
Internal corporate documents discovered during asbestos litigation decades later revealed the industry's response. In the United States, the Sumner Simpson papers — correspondence between Raybestos-Manhattan president Sumner Simpson and Johns-Manville officials in the 1930s — showed that American manufacturers were aware of the Merewether-Price findings and the British regulations.[5] Rather than adopt similar protections, the companies chose to suppress information about asbestos health hazards.
Johns-Manville's corporate medical director, Dr. Kenneth Smith, later acknowledged that the company had been aware of asbestosis among its workers since the 1930s. Corporate documents showed that the company's attorney, Vandiver Brown, edited research findings to minimize references to asbestosis and discouraged publication of studies showing disease in their workers.[7]
This pattern — corporate awareness followed by deliberate concealment — was identical to the behavior documented at Hawks Nest, where Union Carbide knowingly exposed workers to lethal silica dust in the same era. The Merewether-Price Report proved the asbestos industry had the knowledge to protect workers. The corporate documents proved they chose not to.
Who Were Merewether and Price?
Edward Robert Arthur Merewether, M.D. (1882–1944) served as His Majesty's Medical Inspector of Factories within the Home Office. He was responsible for investigating occupational diseases across British industry. His investigation of asbestos textile workers was the most consequential work of his career, though he also conducted studies on silicosis and other dust diseases. He published his medical findings simultaneously in the Journal of Industrial Hygiene (1930) and in the Chief Inspector of Factories' Annual Report for 1929. In 1933–1934, he published a follow-up memorandum on asbestosis in the journal Tubercle, reporting that the average duration of exposure to fatal asbestosis was 15.2 years.[6]
C.W. Price served as HM Engineering Inspector of Factories. He was not a physician but a factory inspector with engineering expertise. His engineering appendix to the report complemented Merewether's medical findings with physical dust measurements using the Owens jet dust counter, ventilation assessments, and specific recommendations for engineering controls to reduce dust exposure.[6]
Why Does the Merewether Report Matter Today?
The Merewether-Price Report established three facts that remain central to mesothelioma and asbestos litigation:
1. The causal link is proven. Since 1930, no serious scientific or legal argument can claim the asbestos-disease connection was unknown. The data showed a clear dose-response relationship: more exposure meant more disease, rising from 0% to 80.9% across employment duration categories.[2]
2. The industry knew. The report was public. It was available to every asbestos manufacturer in the world. Any company that continued to expose workers to uncontrolled asbestos dust after 1930 did so with knowledge that the dust was lethal. This knowledge predates the mass expansion of asbestos use in shipbuilding during World War II by more than a decade.[7]
3. Nine months was enough. The report documented asbestosis in workers with as little as nine months of exposure, demolishing any argument that only decades-long exposure causes disease.[6] This finding remains relevant in mesothelioma litigation, where defendants sometimes argue that brief or intermittent exposure could not have caused disease.
For families dealing with a mesothelioma diagnosis today, the Merewether-Price Report is the foundation of the legal case: it proves that the companies that made, sold, and installed asbestos products knew — or should have known — that their products killed people, and they knew it since 1930.
Frequently Asked Questions
What is the Merewether-Price Report?
The Merewether-Price Report is a 1930 British government study that proved asbestos dust causes fatal lung disease. Written by Dr. E.R.A. Merewether and engineer C.W. Price, it examined 363 asbestos textile workers and found that 26.2% had asbestosis, rising to 80.9% among workers with 20+ years of exposure. It led to the world's first asbestos regulations in 1931.[1]
How many workers did Merewether examine?
Merewether examined 363 workers from an estimated 2,200 British workers exposed to asbestos dust. He examined only current workers — those still employed — meaning workers who had already left due to illness or died were not included. The true disease rate was likely higher than the 26.2% he documented.[2]
What happened after the report was published?
The UK passed the Asbestos Industry Regulations 1931, requiring ventilation, medical exams, and disease reporting in asbestos factories. These were the world's first asbestos-specific regulations. However, they covered only the dustiest factory processes and excluded construction, shipbuilding, and installation workers.[4]
Did asbestos companies know about the report?
Yes. The report was a public government document. Internal corporate correspondence discovered during litigation showed that American manufacturers including Johns-Manville and Raybestos-Manhattan were aware of the findings. They chose to suppress the information rather than warn or protect workers.[5]
Why is the report important for mesothelioma lawsuits?
The Merewether-Price Report proves that the asbestos-disease connection was established scientific fact as of 1930. Any company that exposed workers to asbestos after that date did so with actual or constructive knowledge that the dust was lethal. This knowledge is central to establishing liability in mesothelioma and asbestosis litigation.[7]
Who was Nellie Kershaw?
Nellie Kershaw was a 33-year-old Turner Brothers asbestos textile worker who died of asbestosis in 1924. Her death — and Turner Brothers' refusal to accept responsibility — prompted the Home Office investigation that led to the Merewether-Price Report. She is considered the first person whose death was officially attributed to asbestos disease.[3]
Quick Statistics
- 363 asbestos textile workers examined by Merewether in 1928–1929[2]
- 26.2% overall asbestosis rate (95 of 363 workers)[2]
- 80.9% asbestosis rate among workers with 20+ years exposure[2]
- 0% asbestosis rate among workers with under 5 years exposure[2]
- 9 months — shortest documented exposure duration causing asbestosis[6]
- 15.2 years — average exposure duration for fatal asbestosis cases[6]
- 1931 — year the world's first asbestos regulations took effect[4]
- 2,200 — estimated total British workers exposed to asbestos dust at time of study[2]
Get Help
If you or a family member has been diagnosed with mesothelioma or asbestosis from occupational asbestos exposure, the legal right to compensation is well established — built on the foundation the Merewether-Price Report laid in 1930.
Contact Danziger & De Llano for a free case evaluation. Our attorneys specialize in asbestos disease litigation and can explain your legal options.
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Free, Confidential Case Evaluation Call (866) 222-9990 or visit dandell.com/contact-us No upfront fees • Experienced representation • National practice |
| ⚠ Statute of Limitations Warning: Filing deadlines vary by state from 1-6 years from diagnosis. Texas allows 2 years from diagnosis or discovery. Contact an attorney immediately to preserve your rights. |
Related Pages
- Asbestosis — the lung disease Merewether and Price documented in 1930
- Hawks Nest Tunnel Disaster — parallel 1930s industrial health catastrophe in the United States
- British Asbestos Regulation — UK regulatory history including the 1931 Asbestos Industry Regulations
- OSHA Asbestos Standards History — American regulatory framework that followed decades later
- Mesothelioma Diagnosis — understanding diagnosis for asbestos-caused cancers
References
- ↑ 1.0 1.1 1.2 Barry Castleman, D.Sc. (2005). Asbestos: Medical and Legal Aspects (5th edition). Aspen Publishers. Standard reference work on asbestos history and Merewether-Price data.
- ↑ 2.00 2.01 2.02 2.03 2.04 2.05 2.06 2.07 2.08 2.09 2.10 2.11 2.12 2.13 2.14 2.15 2.16 2.17 2.18 2.19 Merewether, E.R.A. and Price, C.W. (1930). Report on Effects of Asbestos Dust on the Lungs and Dust Suppression in the Asbestos Industry, Table 3. Data verified against Castleman (2005), EPA/NAPCA (1969), and IBAS (2000).
- ↑ 3.0 3.1 3.2 History of Asbestos & Mesothelioma, Mesothelioma.net
- ↑ 4.0 4.1 4.2 4.3 4.4 4.5 British Asbestos Regulation, WikiMesothelioma
- ↑ 5.0 5.1 5.2 5.3 Asbestos & Mesothelioma History, Mesothelioma Lawyer Center
- ↑ 6.00 6.01 6.02 6.03 6.04 6.05 6.06 6.07 6.08 6.09 6.10 6.11 6.12 6.13 Merewether, E.R.A. and Price, C.W. (1930). Report on Effects of Asbestos Dust on the Lungs and Dust Suppression in the Asbestos Industry. London: HMSO. Original report laid before Parliament 24 March 1930.
- ↑ 7.0 7.1 7.2 7.3 History of Asbestos Use & Regulation, Danziger & De Llano