618 General Notes. [June, 
develop at the start in much the same way as those of other Mam- 
malia, but that their evolution is complicated somewhat by the 
early appearance of the folds on either side of the mammary area, 
which grow upward to form the sides and roof of the fossz, which 
eventually enclose the nipples. The condition of the still earlier 
stages of the gland, judging from the general appearance of my 
sections, must be very similar to that observed in other mammals 
by Huss, Langer, Kölliker and others.— ohn A. Ryder. 
PHYSIOLOGY." 
BACTERIA LITERATURE.— Bacteria, by G. M. Sternberg, M.D. 
Wm. Wood & Co., N. Y., 1885; Micro-organisms and Disease 
by E. Klein, M.D., F.R.S., Macmillan & Co., 1884. English- 
reading students are to be congratulated that two such competent 
workers as are the authors of these books have not only given 
accounts of our knowledge concerning bacteria, but have de- 
scribed in sufficient detail their experimental methods so that the 
laboratory student has but to follow directions in order to enter 
the field of bacteria research. 
Dr. Sternberg’s work includes a translation of Megnin’s Bac- 
teria, in which are described the morphology, classification and 
physiology of the germ fungi. But the laboratory student will 
find particularly valuable the translator’s original chapters on 
technology, germicides and antiseptics, bacteria in infectious dis- 
eases and bacteria in surgical lesions. Photo-micrographs form 
in part the illustrations of the book. To a worker the bibliogra- 
phy alone is more than worth the price of the book. 
Photo-micrographs and how to make them, by the same - 
author, is an elaborate and practical aid in this special branch 
of technology. 
"he work of Dr. Klein is a reprint of a series of articles which 
appeared first in the Practitioner. In addition to a clear account 
-of methods of research the author gives a copiously illustrated 
description of the forms of bacteria and a consideration of their 
relation to disease, Especially valuable are the criticisms on such 
views as Buchner’s concerning the transmutability of pathogenic 
and non-pathogenic forms. 
__ Vaso-MoToR Nerves.—Recherches Experimentales sur le Sys- 
teme Nerveux Vaso-moteur, Paris, Masson, 1884, pp. 338. Under 
this title MM. Dastre and Morat collect and publish with consid- 
erable diffuseness the results of observations on the functions of 
the vaso-motor nerves already announced by them during the last 
| at toes k : 
__This work does not strike the reader as a very keen criticism 
: of disputed points in this difficult subject, nor is ee considerable - 
- pr ingenuity manifested. The method of exposition, 
P nt is edited by HENRY SEWALL, of Ann Arbor, Mich. 
