330 Sir William Hamilton’s Remarks on 
from M. Scipion Gras, Chief Engineer of the Mines of Gre- 
noble, collections of fossils from the mines of Lamure and 
Tarentaise, which comprehend upwards of 40 species, among 
which a great number belong to the most characteristic ge- 
nera of the coal-formation. Such are the Sigillariz, eight 
or nine in number, five of which are well determined, the 
Stigmaria ficoides, three Lepidodendron, a Lepidophiloios, the 
Annularia longifolia and brevifolia ; in a word, the entire coal 
vegetation, such as it presents itself at St Etienne or Alais. 
With regard to the explanation derived from transporta- 
tion from remote regions, where this vegetation is maintained, 
it becomes less admissible every day in proportion as the 
number of specimens increases, and we perceive that there 
does not occur a single example of vegetables peculiar to the 
lias period mingled with them. 
(To be concluded in our neat Number.) 
Remarks on Dr Morton’s Tables on the Size of the Brain. By 
Sir WILLIAM HamMILToN, Bart., Professor of Logic and 
Metaphysics in the University of Edinburgh. Communi- 
cated by the Author. 
{Having laid a copy of Dr Morton’s Tables, at page 262 of 
the present Number of this Journal, before my friend and col- 
league, Sir W. Hamilton, who has been long engaged in re- 
searches into the natural history of the brain of man, he 
kindly sent me the following important remarks, which I 
have great pleasure in communicating to the readers of the 
Philosophical Journal. They are, I hope, percursors of more 
extended observations from the same distinguished philo- 
sopher] :—dit. Ed. N. P. Journas. 
* What first strikes me in Dr Morton’s tables completely 
invalidates his conclusions,—he has not distinguished male 
from female crania. Now,as the female encephalos is, on an 
average, some four ounces troy less than the male, it is im- 
possible to compare national skulls with national skulls, in 
