Historical figure · Pearson Edexcel International GCSE revision on Incandio

James Lind

The Man Who Ran the First Fair Trial · Naval Surgeon · 1716–1794

The naval surgeon who took twelve scurvy-ridden sailors, gave six remedies a fair chance against each other, and found the answer in oranges and lemons.

Defend these ideas against Lind

Incandio is a free revision platform for the Pearson Edexcel International GCSE, and on it a topic counts as mastered only once you have learned it, proved it in questions, taught it back and defended it against the person with the strongest claim on it. James Lind is that person for one topic on the course:

• A Balanced Diet — Biology

Who was Lind?

James Lind was born in Edinburgh in 1716 and went to sea as a surgeon's mate at twenty-three. Scurvy was then the great killer of the sailing navies — on long voyages it destroyed more men than battle, storms and every other disease put together; Anson's circumnavigation of 1740–44 lost over half its crews to it. In May 1747, aboard HMS Salisbury on blockade in the Channel, Lind did something quietly without precedent: he took twelve scorbutic sailors 'as similar as I could have them', housed them together on the same diet, split them into six pairs, and gave each pair a different reputed remedy — cider; elixir of vitriol; vinegar; seawater; a purgative paste; and two oranges and a lemon daily. The citrus pair recovered almost at once, one fit for duty in six days; nothing else worked. It is remembered as the first controlled clinical trial. Lind published his Treatise of the Scurvy in 1753, and served from 1758 as physician to the great naval hospital at Haslar, where scurvy filled his wards. Yet he never grasped why the fruit worked, buried the trial in four hundred pages of theory about blocked perspiration and bad digestion, and recommended a boiled citrus 'rob' that his own preparation had robbed of its power. The Admiralty ordered lemon juice for the fleet only in 1795 — the year after he died.

Major achievements

• Ran the first controlled clinical trial — twelve sailors, six treatments, like compared with like, 1747
• Proved oranges and lemons cure scurvy, the disease then killing more sailors than battle
• Published the Treatise of the Scurvy (1753), the first systematic review of everything written on the disease
• As physician at Haslar, ran the largest hospital in Europe and pressed for cleanliness, fresh food and distilled water at sea
• Proposed shipboard distillation of seawater for drinking

Life in brief

• 1716 — Born in Edinburgh: Son of a merchant.
• 1739 — To sea as surgeon's mate: Nine years in the Navy, mostly on blockade and convoy.
• 1747 — The trial aboard HMS Salisbury: Twelve sailors, six remedies, two men each. The citrus pair recover.
• 1748 — MD at Edinburgh: Leaves the Navy to practise and to write.
• 1753 — A Treatise of the Scurvy: The trial, buried in a systematic review of everything ever written on the disease.
• 1758 — Physician at Haslar: The great naval hospital at Portsmouth; scurvy fills its wards.
• 1794 — Dies at Gosport: One year before the Admiralty orders lemon juice for the fleet.

Explore the life of Lind — five chapters

1. The Disease That Emptied Ships — What scurvy actually did to the sailing navies
2. Twelve Sailors, Six Treatments — HMS Salisbury, May 1747
3. Buried in Four Hundred Pages — The Treatise of 1753, and why nobody noticed
4. Boiling Away the Cure — The rob, and the mistake that destroyed the evidence
5. The Shape of the Test — What actually survived, and what it cost to wait

Read the five-chapter life of James Lind →

Where Lind appears in your course

James Lind has a genuine claim on 1 lesson of the Pearson Edexcel International GCSE science course built into Incandio:

• A Balanced Diet — Biology: Scurvy — the deficiency disease this lesson names under vitamin C — killed more sailors than battle, and every physician had a theory. In 1747, aboard HMS Salisbury, Lind ignored the theories and arranged a comparison: twelve similar patients, one shared diet, six remedies given to matched pairs. Only the pair on oranges and lemons recovered. It is remembered as the first controlled clinical trial, and it proved the cure for a disease whose cause — a missing tiny-quantity essential — his century had no way to imagine.

Begin

• Start a conversation with Lind — a dramatised, historically grounded AI portrayal
• Read the Historical Brief
• Explore the life of Lind — five chapters
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