Morton’s Crania Americana. 351 
the third, the brain weighed 2 lbs. 5 oz. ; the cerebellum, 5 oz. ; 
together, 2 ibs. 10 oz. 
In the appendix to Dr. Monro’s work on the brain, Sir William 
Hamilton states the average weight of the adult male Scotch 
brain and cerebellum to be 3 Ibs. 8 oz. troy. 
Again, a difference in mental power between men and women 
is also geuerally admitted to exist, and there is a correspouding 
difference in the size of their brains. 
Sir William Hamilton states the average weight of the adult 
female Scotch brain and cerebellum, to -be 3 Ibs. 4 oz. troy; 
being 4 oz. less than that of the male. He found one male braia 
in seven to weigh above 4 lbs. ; and only one female brain ina 
hundred exceeded this weight. j 
In an essay ‘on the brain of the negro, compared with that of 
the European and the ourang outang, published in the Philosophi- 
cal Transactions for 1836, part II, Professor Tiedemann, of Hei- 
delberg, adoptsthe same principle. After mentioning the weights 
of fifty-two European brains, examined by himself, he states that 
“the weight of the brain in an adult male European, varies be- 
tween 3 Ibs.. 2 oz: and 4 Ibs. G oz. troy. The brain of men 
who have distinguished themselves by their great talents, is often 
very large. The brain of the celebrated Cuvier weighed 4 lbs. 
lioz. 4dr. 30 gr. troy, and that of the distinguished surgeon Du- 
puytren weighed 4 Ibs. 10 oz. troy. The brainof men endowed 
with but feeble intellectual powers is, on the contrary, often very 
small, particularly in congenital idiotismus. . The female brain is 
lighter than that of the male. It varies between 2 lbs, 8 oz. and 
3 Ibs. 11 oz. I never fonnd a female brain that weighed 4 Ibs, 
The female brain weighs on an average from four to eight oun- 
ces less than that of the male; and this difference is already per- 
ceptible in a new-born child.” | 
We have adduced these proofs and authorities in support of the 
Proposition that size influences power, because we conceive it to 
be a principle of fundameutal importance in every investigation 
into the natural history of man, founded on the physiology of the 
brain; and also because in the hasty zeal of many of the oppo- 
nents of phrenology, to undermine the discoveries of Dr. Gall, it 
has been denied with a boldness and pertinacity more allied to 
the spirit of contentious disputation, than to that of philosophical 
enquiry. Its importance ina dissertation on national crania is 
