James Lind: testing a remedy for scurvy at sea

In 1747, aboard the Royal Navy ship HMS Salisbury, surgeon James Lind set out to compare possible treatments for scurvy. Twelve sick sailors received the same basic diet, with different additional treatments assigned to six pairs. The two men given oranges and a lemon recovered most clearly: one was fit for duty within six days, and the other had almost recovered. Lind’s experiment did not make him the first person to suggest citrus as a remedy, nor did it settle the cause of scurvy. Its importance lay in testing alternatives systematically, an approach that made him a pioneer of clinical investigation and naval hygiene.

From Edinburgh to the Navy

Lind was born in Edinburgh on 4 October 1716 into a merchant family. In December 1731, he began an apprenticeship in medicine with George Langlands, a member of the Incorporation of Surgeons. The work included preparing medicines, dressing wounds and attending to patients. After about eight years, Lind went to London seeking medical work and joined the Royal Navy in 1739 as a surgeon’s mate.

His service took him through the English Channel and Atlantic during the War of the Austrian Succession, and to the Mediterranean, West Africa and the West Indies. He observed illness and living conditions aboard ship, including a major outbreak of typhus in the fleet and poor hospital provision for sick sailors at Mahón. These experiences informed a career concerned not only with treating individual patients but also with preventing disease.

By 1747 Lind was ship’s surgeon on HMS Salisbury, patrolling the Bay of Biscay. After about two months at sea, scurvy affected the crew, giving him an opportunity to test treatments. He left active sea service the following year and completed medical studies at the University of Edinburgh, receiving his MD in 1748. He then practised as a physician in Edinburgh.

What the Salisbury experiment showed

Lind’s experiment began on 20 May 1747. He divided twelve sailors suffering from scurvy into six pairs. Each pair received the same general diet, alongside a different supplement: cider; elixir of vitriol; vinegar; seawater; oranges and lemon; or a spicy paste with barley water. The citrus group’s fruit ran out after six days. By then, one sailor could return to duty and the other was nearly recovered. The cider group showed some improvement; the other treatments did not produce comparable results.

The comparison was an early controlled clinical experiment, but it should not be mistaken for a modern trial. Lind believed scurvy arose from putrefaction in the body and thought acidity might counter it. He therefore tested several acidic substances and did not understand the role of vitamin C. Citrus fruit had been recommended for scurvy before his experiment; Lind’s distinction was to compare its effect systematically with other proposed remedies.

In 1753, he published A Treatise of the Scurvy. The work recorded his observations, but its recommendations were not immediately adopted throughout the Navy. Lind’s later writing also shows that he did not regard citrus as a single, complete answer: he believed scurvy had multiple causes and considered a range of remedies. His experiment was influential as evidence, but its author’s interpretation remained shaped by the medical ideas of his time.

Health beyond one remedy

In 1758 Lind became chief physician at the Royal Naval Hospital at Haslar, near Gosport. He held the post until retiring in 1783. In his first two years, he recorded 5,735 patients; 1,146 showed signs of scurvy. At Haslar he continued to investigate treatments and produced further editions of his work on scurvy, as well as writing on naval hygiene and diseases in hot climates.

Lind argued for better ventilation aboard ships and for regular cleanliness, including clean clothes and bedding. His observations at Haslar led him to recommend washing patients and changing their clothes and bedding to help prevent typhus. He also investigated how ships might obtain fresh water. In 1759 he found that steam from heated seawater could be used as fresh water, and he developed a small-scale arrangement using a kettle, a musket barrel and a cask. He presented the method to the Royal Society in 1762; it could supply water aboard some ships, though it was not yet a practical way to distil enough for a whole crew.

His 1768 work on diseases in hot climates addressed doctors and British emigrants as well as naval medicine. It remained in use as a medical text for decades. Taken together, these projects show the breadth of his interest in prevention: the conditions in which sailors lived, the water they drank and the diseases they encountered mattered alongside treatment at the sickbed.

From evidence to naval provision

Lind’s experiment was part of a longer process, not the sole cause of the Navy’s eventual use of citrus. Other naval physicians, including Gilbert Blane and Thomas Trotter, also argued for citrus and vegetables. In 1794, lemon juice was issued for a long voyage to India aboard HMS Suffolk. The voyage passed without a serious outbreak of scurvy, and the following year the Admiralty accepted a recommendation to issue lemon juice routinely to the fleet. Supply remained limited at first; it was only after 1800 that lemon juice began to be issued generally.

This chronology matters. Citrus could prevent scurvy, but recognition of its value, provision at sea and an understanding of the disease’s cause were separate developments. The older nickname “limeys” reflects the later association between British sailors and citrus rations, but it should not obscure the gradual, practical changes behind that association. Lind’s work contributed evidence to a debate that involved other medical officers and naval decision-makers.

Lind retired in 1783 and received a pension from the naval commissioners. He was among the founding members of the Royal Society of Edinburgh that year. He died in Gosport on 13 July 1794 and was buried at St Mary’s Parish Churchyard in Portchester. His later recognition includes a place among the names on the London School of Hygiene and Tropical Medicine’s public-health frieze; the James Lind Alliance also bears his name.

Why James Lind deserves a place in British Legacy

Lind’s place in British history rests on a specific contribution to medicine and naval life: he tested competing treatments for scurvy in a way that made their effects easier to compare. Earlier writers had recommended citrus, but Lind’s experiment aboard HMS Salisbury recorded how a group of patients responded to different additions to the same basic diet. The result did not answer every question about scurvy, and the disease’s cause remained misunderstood in his lifetime. It did, however, provide a memorable example of systematic comparison in medical practice.

His significance also lies in the wider range of problems he tackled as a naval physician. At Haslar, he investigated scurvy and argued for cleaner clothes and bedding, better ventilation and improved shipboard hygiene. His work on distilling seawater addressed the practical difficulty of securing fresh water on long voyages, while his writing on disease in hot climates extended beyond the Navy. These efforts connected clinical observation with prevention and the conditions in which people lived. The later adoption of lemon juice by the Admiralty was not Lind’s achievement alone, but his experiment formed part of the evidence behind a change that eventually became routine. His legacy is therefore not a simple tale of one discovery instantly curing a disease; it is the story of observation, testing and gradual change in British medicine and naval health.

Sources

James Lind — revision 1359022684

Adapted in part from James Lind by Wikipedia contributors, under CC BY-SA 4.0. Text has been edited and combined with the existing article; this adapted text is shared under the same licence. Contributor history.