76 Bulletin of the Brooklyn Entomological Society. Vol. XIV 
BOOKS. 
Forced Movements, Tropisms, and Animal Conduct. By 
Jacoures Lore, M.D PD Sc.D: etc: J. B: Lippincocace 
Co., $2.50. 
This is the first volume of the series of monographs on experimental 
biology, which this firm is publishing under the editorship of Dr. Loeb, 
Prof. T. H. Morgan, of Columbia, and Prof. W. J. V. Osterhout, of 
Harvard. The chief interest of this monograph to entomologists lies in 
the experimental work based on the observed reactions of insects to ex- 
ternal stimuli. Wherein the work relates to facts, it depends for accuracy 
on the reliability of the original experimenter. The hypotheses dependent 
on these facts are Dr. Loeb’s own, and doubtless will be. much contro- 
verted by other specialists. The final philosophy to which it all tends is 
beyond the realm of the observer of insects, whose working time is far 
too brief to hope to test the infinity of facts and phenomena that daily 
present themselves in his work. To a field entomologist it might seem 
that the artificial experimental conditions might tend to vitiate the reac- 
tions of the insects, and that the necessarily restricted numbers as well as 
the comparatively few forms used in experimentation are scarcely sufh- 
cient to draw final conclusions from. However we may regard this work, 
it assuredly points the way to the working entomologist for most signifi- 
cant and fascinating experimentation and observation. 
The second volume to appear of this series, The Elementary Nervous 
System, by G. H. ParKer, Sc.D., has just reached us. It is not of direct 
appeal to the entomologist, of course, since it relates to the lower forms 
of life only, without reference to the articulata, but all those interested in 
the broader field of biology will find it excellent. 
Animal Parasites and Human Disease. By Asa C. CHANDLER, 
M.S., Ph.D. John Wiley & Sons, $4.50. 
Perhaps no branch of entomology has so suddenly and so vividly 
reached the public consciousness as that which deals with the conveyance 
of disease by insects. In this book Mr. Chandler studies first the animal 
diseases carried by insects, and then their effect on human beings; and in 
the second part, the insect intermediate hosts and the ways of transmis- 
sion of the parasites. The entomologist who wishes to keep abreast with 
the newest, most progressive side of entomology will find this work well 
worth reading. 
Vo 1, I, 1B. 
