LINN ZUS. ‘ W 
n the meantime this eminent man had pre- 
pared a lasting monument of his own talents and 
application, which even his rival, Haller, nobly 
denominates the maximum opus eternum, the 
SPECIES PLANTARUM, 
First edition, 1753, second edition, 1762; in 2 vols., 
octavo. This work, well known for its great im- 
portance asa complete arrangement and defini- 
tion of every plant of which its author had any 
satisfactory knowledge, is very memorable for 
the adaptation of specific names. This simple 
and happy invention by Linnzeus was extended 
to minerals, in his Museum Tessinianum, and sub- 
sequently to all the departments of zoology, has 
rendered his works more popular than any other 
of their merits. Specific differences, previously 
guage, were it not for this simple and happy in- 
vention. By this means we speak of every natural 
production in the three kingdoms of nature in two 
words, its generic and specific name. The Lin- 
and this principle has been with great advantage 
extended to chemistry, of which Bergman, the 
friend of Linnzeus, originally set the example. 
His great and important work the ‘‘ Systema 
Naturve,’’ appeared much enlarged in a twelfth 
