200 General Notes. [F ebruary, 
Chapter xxl. Importance of focd. 
Chapter XXIII. Suckling among various peoples, ancient and modern. 
Chapter xxiv. Among the Russians. 
Chapter xxv. Among other peoples of Russia. 
Chapter xxvi. Ethnic mutilations of children, tattoo, depilation, piercing the nose, 
the ears, the lips or the cheeks; filing and removing the teeth, castration, cir- 
cumcision and similar mutilations; corset, Chinese feet, high heeled boots, &c. 
Chapter xxvii. Games, sports and amusements of children. 
Chapter XXVIII. Treatment of the maladies of children among different peoples. 
Popular child medicine in Russia, Germany, England, Switzerland, Dalmatia, 
among the Kalmucks, Kirghiz, Caucasians, ancient Hindoos, Iranians, etc. 
Chapter XXIX. Care relative to the corporeal development of children and the 
means employed to toughen and fortify them; seclusion of children, asceticism, 
horsemanship, physical and warlike training of children among savages, etc. 
Chapter xxx. Role played by animals in the education of man,—cows, goats, dogs, 
wolves, apes, etc. 
Chapter xxxI. Physical education among the children of Russian peasants, and the 
results. 
Chapter XXXII. Conclusions. 
MICROSCOPY. 
Osmic Acip AND MERKEL’s FLUID As A MEANS OF DEVELOP- 
relations and internal structure, We next endeavor to ascertain 
which of the fluids appearing to satisfy the first point will leave the 
preparation in the most favorable condition for sectioning; and, 
finally, we have to consider the differentiating capacity of the 
fluids, and the conditions under which the highest differential 
effects can be obtained. This highly important quality, which 
belongs, in varying degree, te all hardening and staining reagents, 
serves two general purposes, one of which is purely histological, 
the other strictly embryological. In the one case, the aim is to 
sharpen the definition of individual elements, and to strengthen 
histological distinctions; in the other, the object is to demon- 
strate those subtle and imperceptible differences in the constitu- 
tion of embryonic cells, which furnish the earliest premonitions of 
their histological destiny. The histologist deals with the first 
class of distinctions—the embryologist must deal with both. The 
embryologist cannot stop with the study of structure and topo- 
graphical relations, as they exist in any particular stage; he is 
compelled to follow the entire developmental history of the cells, 
from their most indifferent up to their most highly specialized 
condition. Beginning with material more or less homogeneous 
in aspect, he finds it necessary to forestall development, and seeks 
to bring out distinctions that have not yet ripened into morpho- 
1 Edited by Dr. C. O. WHITMAN, Mus. Comp. i 
E ona babes ie Aeolian Society of Nathalie: Depart ae 
