370 
NATURE 
\ 
[May 30, 1912 \ 
the observations made years ago at Sheffield 
University that sorbite is merely pearlite contain- 
ing its FegC in a fine state of division. Mr. Har- 
bord has also ignored the researches recently 
published by the Iron and Steel Institute, where 
the so-called troostite yielded practically the whole 
of its carbon as carbide. 
Turning to vol. ii., for which Mr. Hall is 
responsible, this naturally deals with metallurgy 
from an engineer’s point of view, and so treats 
itin an able manner. But in connection with coal- 
fired reheating furnaces Mr. Hall is disturbed at 
what he considers their wastefulness in the loss 
of fuel as smoke. As a metallurgist the reviewer, 
speaking from personal research data, would re- 
assure Mr. Hall on this point. The use of smoke 
in reheating fine steel is an art, and without 
smoke there would be no fine steel. Mr. Hall 
deals with hammers, rolling mills, and presses, 
illustrating his text with many excellent figures. 
He also describes the fluid compression of steel, 
wire-drawing, and tube-making. This 
volume thus forms a valuable engineering supple- 
ment to the metallurgical matter dealt with by 
Mr. Harbord in vol. i. 
These books should be on the shelf of every- 
one interested in steel metallurgy, and the steel 
world is much indebted to the authors for their 
able and laborious work. It is, however, certain 
that owing to the rapid progress of scientific re- 
search the portions of vol. i. dealing with the 
physical chemistry of steel will for a further 
edition require drastic revision, or even re- 
writing, to render them of practical value to the 
student. J. O. Arno Lp. 
EXPERIMENTAL PSYCHOLOGY. 
A Text-book of Experimental Psychology, with 
Laboratory Exercises. By Dr. C. S. Myers. 
Second edition. Parti., Text-book. Pp. xiv+ 
344. Part ii., Laboratory Exercises. Pp. iv+ 
107. (Cambridge: University Press, 1g1r.) 
Price, two vols., tos. 6d. net. 
HE first edition of Dr. C. S. Myers’s book 
was reviewed in the pages of this journal 
three years ago. The present edition is issued 
by a different publisher, viz., by the Cambridge 
University Press in the place of Mr. Edward 
Arnold, and the laboratory exercises now appear 
in a separate volume. The revision of the work 
has been very thorough, and in many parts im- 
portant and extensive additions have been made. 
Certain psychological results appearing in Dr. 
Henry Head’s “Croonian Lectures” of last year 
have been incorporated in the text, and a most 
important concluding chapter on the experimental 
NO. 2222, VOL. 89] 
“ices 
second | 
| related. 
investigation of thought and volition has been 
added. 
The publication of the first edition marked an 
epoch in the history of the teaching of psychology. 
The edition just issued is probably the most com- 
plete text-book of experimental psychology in this 
or any other language. Every page is loaded 
with trustworthy statements of verified fact, yet 
the argumentation is so well ordered and the style 
so concise and clear that the book ‘can be read 
with ease and pleasure. A bibliography of all the 
important monographs and articles upon the sub- 
ject under discussion is appended to each chapter ; 
in the text conflicting views are carefully weighed 
and balanced one against another, and no con- 
clusions are stated without sound justifications of 
this kind. 
The wide scope of the book may be indicated by 
an enumeration of the headings of the various 
chapters. These are:—“The Standpoint of 
Experimental Psychology,” “Cutaneous and 
Visceral Sensations,” ‘Auditory Sensations” 
(two chapters), “ Labyrinthine and Motor Sensa- 
tions,” ‘Visual Sensations” (two chapters), 
‘““Gustatory and Olfactory Sensations,” ‘“‘ Specific 
Energy of Sensations,” “Statistical Methods,” 
“Reaction Times,’ “Memory” (two chapters), 
“Muscular and Mental Work,” “The Psycho- 
physical Methods,” ‘Muscular Effort,’ ‘‘ Local 
Signature,” “Sensibility and Sensory Acuity,” 
“Experiences of Identity and Difference,” 
“Binocular Experience,” “‘ Binaural Experience,” 
“Visual Perception of Size and Direction,” “Time 
and Rhythm,” “Feeling,” “Attention,’’ “ Thought 
and Volition.” 
Addition chapters on the experimental 
vestigation of the psychology of young children 
and animals would have made the treatment of 
representative topics more complete, but the 
author is probably well advised in leaving these 
rather outlying subjects to books specially devoted 
to their treatment. 
A standard text-book is notoriously difficult to 
review, and in a case like the present, where the 
book stands alone, this difficulty is especially 
great. There are one or two slips, however, that 
may be pointed out. At the end of the chapter 
on ‘Statistical Methods,” on p. 124, in the 
mediate term showing the reduction of the 
ordinary product-moment formula to the corre- 
sponding rank-formula for the correlation co- 
efficient, the term (xy) is not identical with the 
term (xy) of the product-moment formula, and 
should have been written S(ab), where a and b 
are corresponding ranks in the two series cor- 
In this chapter, too, mention might use- 
fully have been made of the conception of 
in- 
vid 
