gee 
Woodbridge and Willard’s Geography. 399 
washed bare on the banks of the Ohio and Green rivers— 
intermixed is a mineral of a bright green and yellow hue, . 
which is used for the same purposes as Copperas. Families 
that die woollen or cotton cloth collect a quantity of this 
coal, putit into a proper vessel to which they add water and 
boil till the water has extracted the mineral from the coal. 
In this water they immerse the articles to be dyed. Cop- 
peras too has been manufactured from this coal, in some 
small quantities, and sent abroad for market. x 
Through this coal all the waters in and about Henderson 
probably pass, and thereby acquire strong mineral proper- 
ties, which give them a particular taste and render them 
pernicious to health.” 
6. A System of Universal Geography; on the precipi, 
of Comparison and Classification ; illustrated by Maps and 
Engravings. Modern Geography. by William C. Wood- 
bridge, A. M. late Instructor in the American Asylum. 
Ancient Geography, by Emma Willard, Principal of the 
Female Seminary at Troy. Hartford: published by Oli- 
_ ver D. Cooke & Sons. 1824. 
The principal object of the authors, in preparing this 
Work, was to give to Geography that scientific arrangement 
which has been so successfully applied to other branches of 
study. Most works on this subject have presented little 
more than a collection of facts, grouped by an imper- 
fect method, and so little connected by any associatin 
principle, as to overload the memory and fatigue the mind. — 
Little or no use has hitherto been made, by the greater 
number of writers, of the important principles of classifica- 
ng geography to the form of a science, and 
1¢ facility of acquiring and retaining its de- 
- fhus increasing th j i i 
tails. Mr. Woodbridge divides the subject into Physical, 
Political and Statistical Geography. Under the first head 
are given general views of the structure and natural divis- 
ions of the earth—its rivers, mountains, climates, produc- 
tions, &c. Political Geography is a description of the state 
of men in society, including an account of their govern- 
Ment, religion, knowledge and arts. Statistical Geography 
— 
ea a 
i 
a of states and empires, with their extent, 
7 
od resources. e manner in which these 
population a 
subjects are treated shows extensive research, and under 
