io? Reflections on some Mineralogical Systems. 
the natural sciences is, that unity of compesition 18 ace 
companied by unity of form. In it we find the harmony 
of nature, and it strikes the mind as an immutable law.” 
iH 1 had to advise a young man destined to be a miner, 
I should say to him, «Go to Freyberg.” If an amateur, 
who exhibited no proof: of thought, consulted me, T would 
say to hin, “Go to Freyberg.” But to the promising 
youne philosopher, if J wished his Pree ae not to be 
impaired, T wouid say) ** Go not to Freyberg.” 
Let me be allowed to terminate this memoir by some 
general. ideas on the cause of this difference between the 
1wo systems, and to inquire why Werner has spoken to 
artisans ’rather than M. Haiiy who has written for philo~ 
sophers. 
Mechanics 10 England, chemistry in France, and mi- 
neralogy i Germany, are, if we may so ‘speak, the three 
national sciences. They forny’a striking contrast with 
astronomy and optics, which, in consequence of the few 
occasions which they have of leaving the cabinets of the 
learned, remain within the pale of philosophy, and are less 
obscured byverrors and vulgar prejudices. -The people dis- 
pense with a knowledge of the stars; even their movements, 
their distances, are unknown by them in nations which 
have extended their observations furthest, and which, cele- 
brated in the records of navigation, require them as guides © 
in the midst of the ocean to pass from one hemisphere to 
the other. The greater part of old or short-sighted persons, 
who have recourse to optics to remedy their natural defects 
of vision, do not reasan on the implements which they use. 
Even the naturalist, quite a philosopher as he may be, who 
discovers living worlds on the leaf of a plant, is not always 
an optician ; ; nor is he obliged to be so, the principles of 
the science remaining between the professor of physics who 
studies the lig! ht, and the astronomer who contemplates the 
stars. 
Let us examine the state of these three branches of 
knowledge among each of the three nations, and consjder 
them in each under the twofold point of view cf art and of 
science. 
In a country where the marvellous progress of enlightened 
industry has forced them to invent new means to ‘procure 
new profits, it was necessary {o imagine: machines which 
might combine in one point the strength of several arms to 
eeconomize labour and expense, and to place at their dis- 
posal almost unlimited resources. Manufactures are the 
cause of mechanics becoming popular in England, and the 
fortunate 
