1753 · James Lind
A Treatise of the Scurvy, in Three Parts
What this work is
Lind's 1753 treatise on scurvy. He compares groups who breathed the same air but ate different food, from fleets at sea to soldiers in Hungary, and gathers reports of sailors recovering when fresh vegetables replaced salt meat. He argues that scurvy comes from a poor diet, not from the air.
Then and now
Lind showed that men on coarse salt food got scurvy while better-fed men breathing the same air did not, and that fresh food cured it. Medicine now holds him up as the first clinical trial, the founding story of drug trials. His case rested on watching food and bodies, not on trial statistics.
Verdict
SCIENTIFIC
The work follows the scientific method and does not operate inside a theoretical framework. The verdict is scientific.
1·This work · no theoretical framework
SCIENTIFIC
Follows the scientific method. No theoretical framework attached.
2·Paradigm · Basic Epidemiological Comparison
NOT APPLICABLE
No theoretical framework. The study verdict decides.
How the verdict is decided
This work does not operate inside a theoretical framework. Using hospital records, billing codes, or diagnostic names as labels on visible events is not the same as depending on that framework. The verdict is the work methodology score alone.
1·This work
Did this work test its claim with methods that are independent, falsifiable, and non-circular?
SCIENTIFIC
This work claims that scurvy comes from a coarse, vegetable-poor diet rather than from the air, and that fresh vegetables and proper diet prevent and cure it. All three tests pass.
Independently Verifiable
Pass
The evidence is men with bleeding gums and rotting legs, counted burials, and recoveries after the diet changed, all things a stranger can watch without any theory of the disease.
Falsifiable
Pass
If the better-fed officers and dragoons had sickened alongside the coarse-fed men, or if vegetables had failed to cure, the diet claim would have been falsified on these very pages.
Non-Circular
Pass
What each group ate was recorded by looking at provisions and pay, and who got sick was recorded by looking at gums and legs, so neither measurement was built from the cure it was used to prove.
Why
Bleeding gums, rotting legs, burials, and recoveries are things anyone could watch. If the better-fed officers had sickened like the men, or vegetables had failed to cure, the diet claim would have been falsified on these pages. What each group ate was recorded from provisions and pay, and who sickened from gums and legs, so neither came from the cure.
2·Paradigm · Basic Epidemiological Comparison
The three tests do not apply. There is no theoretical framework.
NOT APPLICABLE
Why
Lind's comparisons do not depend on the medicine of his day to function. He did not need the doctrine of humors, or his own talk of putrefaction and fixed air, to count a burial, to see a sailor's gums bleed, or to notice that the men eating peas and salt pork sickened while the men eating from the officers' tables did not. Those chapters of theory sit on top of the observations as explanation, and stripping them away leaves the observations intact. A person who rejected every medical theory of 1753 could still read the fleet numbers and the Hungarian comparison and check the claim. That makes this a plain comparison of visible events between defined groups, and there is no framework here for the three tests to score.
From the work
It is demonltrable from the appearance of the calamity in e- very part of the world, that no hate of air whatever is capable of producing it, without the concurrence of grofssvifcid diet, and abitinence from green vegetables.
I haw? known the Chan¬ nel fleet bury a hundred men in a cruife, and land a thoufand mor£
Who were attacked by it ? Only the Bohemians , who eat the coarfeft and molt grofs food.
So foon as the fymptoms of feurvy appeared, I difeharged the ufe of fait meat ; and confined my patients to the vegetable articles of diet on board, with what frefh victuals could be had from the officers tables.