Se ee aan ET eM e ee 
Paleontological Discovery. 335 
in the strata according to the order of oe Sptlnctd = heavier 
shells in stones, the lighter in chalk, and so of the 
The most — work on fossils ential in > Geraial 
at this time, was that of George Wolfgang Knorr, which was 
continued after his death by Walch. This work consisted of 
four folio bspeere with many plates, and was printed at 
Nuremberg, 1755-73. A tizye number of fossils were accu- 
rately figured and described, and the work is one of armen 
value.t A French translation of this work a appeare ared in 
1107-78, rence Pe sie hie de meen “ibe: con- 
d descriptions of fossils found in Be 
Abr am Gottlieb erner we 50- 1817), sprotesseroat Min- 
rding 
ae upil, Prof fessor Jameson, first made the highly important 
observation “that different formations can be discriminated 
by the Ae games they contain.” Moreover, “that the petri- 
factions ained in the oldest rocks are very different from 
any of bt aren of the present time ; that the newer the 
formation, the more do the remains appr roach in form to the 
en bein ngs of the present creation.” Tadsvionatily; 
erner ee little, and his doctrines were eee dis- 
seminate 
the igneous theory was hiro cadet by Hutton of Edin. 
burgh, and his illustrator, Playfair. This ssion ted 
in the cv hier ginar se wears geology, but the study of 
by. 
* Essay tow: tural History of the Earth. 1695. 
} Lapides o> schter. cee tie cascanc dail universalis testes, quos in ordines ac 
species disirtbais, was 6 suis coloribus expremit, og a1) Tab, 1755-73. 
