Abstract
The relationship between brain size and intelligence was investigated in 2 ways. Cranial capacity was measured in people with known IQ. A very small correlation was found between cranial capacity and intelligence; but this was shown to be the result of the confounding effects of height. A large series of brains was investigated, data being obtained on occupation from the case notes. When the effects of body height and weight were controlled, it was possible to demonstrate a statistically significant, but very slight, relation between brain size and occupational group.