EDITOR’S INTRODUCTION. x1 
scriptions of geographical localities. The branch of 
study in the district school course which corresponds 
to this is geography. Travels and sojourns in distant 
lands; special writings which treat of this or that 
animal or plant, or family of animals or plants; any- 
thing that relates to organic nature or to meteorol- 
ogy, or descriptive astronomy may be placed in this 
class. 
Second Division. Whatever relates to physics or 
natural philosophy, to the statics or dynamics of air or 
water or light or electricity, or to the properties of 
matter; whatever relates to chemistry, either organic 
or inorganic—books on these subjects belong to the 
class that relates to what is morganic. Even the so- 
called organic chemistry relates to the analysis of 
organic bodies into their inorganic compounds. 
Third Division. History and biography and eth- 
nology. Books relating to the lives of Seer rere and 
especially to the social life of the nation, and to the 
collisions of nations in war, as well as to the aid that 
one gives to another Crone commerce in times of 
peace; books on ethnology relating to the manners 
and customs of savage or civilized peoples; books on 
the primitive manners and customs which belong to 
the earliest human beings—books on these subjects be- 
long to the third class, laine particularly to the hu- 
man will, not merely De individual will but the social 
will, the will of the tribe or nation; and to this third 
class belong also books on ethics and morals, and on 
forms of government and laws, and what is included 
under the term civics or the duties of citizenship. 
