Review of Cleaveland’s Mineralogy. 41 
has hitherto appeared. The author of this volume has, there- 
fore, adopted the general plan of Brongniart, the more im- 
portant parts of whose work are, of course, incorporated with 
this.” 
A happier model could not, in our opinion, be chosen ; and 
Wwe conceive that Professor Cleaveland is perfectly consistent, 
and perfectly perspicuous, when, adopting the chemical com- 
position of minerals as the only proper foundation of arrange- 
ment, and,’ of course, rejecting the principle of Mr. Werner, 
which arranges them upon their external properties, he still 
adopts his descriptive language as far as it answers his purpose. 
For to elect a principle of arrangement, and to classify all the 
members of a system so as to give each its appropriate place, 
is obviously quite a different thing from describing each mem-_ 
ber, after its place in a system is ascertained. In doing the 
latter, characters may be drawn from any source which affords 
the 
m. 
In his “ Introduction to the Study of Mineralogy,” the author 
has given a view at once terse, copious, condensed, and per- 
spicuous, of all that is necessary to be learned previously to 
e study of particular minerals. He begins with definitions 
and general principles, which are laid down with clearness. 
By way of engaging the attention to the study of this depart- 
ment of nature, he remarks : ae 
“From a superficial view of minerals in their natural depo- 
sitories, at or near the surface of the earth, it would hardly be 
expected that they could constitute the object of a distinct 
branch of science. Nothing appears farther removed from 
the influence of established principles and regular arrangement, 
than the mineral kingdom when obsérved in a cursory mamer. 
But a closer inspection and more comprehensive view of the 
subject will convince us, that this portion of the works of na- 
ture 18 by no means destitute of the impress of the Deity: 
indications of the same wisdom, power, and benevolence, which 
“ppear in the animal and vegetable kingdoms, are also clearly 
discernible in the mineral.” 
“Itmay also be remarked,” continues the author, “ that 
several arts and manufactures depend on mineralogy for their 
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