294 NATURAL SCIENCE [November 
certain epochs or periods in which the child made very rapid pro- 
gress, on the thirty-fifth day, in the eleventh month, etc. (pp. 6, 7) 
—an important observation on which more data are desirable. 
Under the head of movements (Part I.) there is a useful record 
of voluntary movements, pointing to the growth of volition out of 
“repetition of an act which had originally caused either a cessation 
of discomfort or a sense’ of gratification” (p. 27). Many of the 
conclusions drawn are naturally rather corroborative of current 
psychology than pointing in any fresh direction. [Parts II. and IV. 
are inferior in quality to the rest. Under Part II., which deals 
with Sensations, we have, on pp. 45 and 56, the note that even 
on the second day the eyes followed the movement of a bright pair 
of callipers—a date important on its bearing on the theory of visual 
space-perception. On page 66 we have the less important denial 
of an unborn ability of localising sounds. On pp. 80, 81, there 
are some remarks on the localisation of pain, which is declared to 
follow that of “other” dismal sensations. On page 87 it is denied 
that attention, at any rate in its involuntary form, comes late: the 
child gazed at a patch of light continuously on the thirtieth day 
(p. 46). Part IV. deals with language, giving careful tables of the 
sounds used and the principal substitutions of sounds for one 
another, as well as full vocabularies of the child at the close of the 
second year. The order at which the different parts of speech 
begin to appear is noted, as well as their numerical importance. 
One point which is emphasised more than once (pp. 123 and 97) 
is that the child’s first names do not refer to indefinite or vaguely 
conceived individuals, but that the child does not understand the 
necessity of a name for each separate thing, and his words stand 
for what is interesting to him in his experience. As against any 
idea that general concepts arise from the fusion of individual 
precepts—this is however what would generally be understood. 
Mrs Moore’s work will be a useful repertory of facts, to which 
she has been careful to supply an index. 
THE INTERNATIONAL GEOLOGICAL CONGRESS 
THE Seventh Session of the International Congress was held 
in St Petersburg last August with great success. The attractive 
programme offered by the Russian geologists, with the aid of their 
Government, brought together a large number—nearly a thousand— 
especially from Germany and Austria. Americans and French were 
well represented, largely by mining engineers anxious to study the 
rich ore deposits of the Ourals. Englishmen were no doubt diverted 
to the other side of the Atlantic by the meeting of the British Asso- 
ciation, and were therefore proportionally few. 
Of the excursions before the Congress, those to Finland and 
