Bibliography. 191 



thoroughness with which he has read each section. Finally, a long ex- 

 perience in one of the best schools in New England, has enabled the 

 author to succeed most happily in adapting this work to the purposes of 

 instruction. 



8. Practical Geology and Mineralogy, with Instructions for the 

 Qualitative Analysis of Minerals ; by Joshua Trimmer, F. G. S. Am. 

 Ed., by Lea & Blanchard. pp. 527, 8vo. — We have read parts of this 

 work, and looked over its plan. It appears to be exact, comprehensive, 

 scientific, and practical. Its principal heads are — 



Introduction ; Pi-actical Application and Uses of Geology ; its dis- 

 coveries not opposed to religion. 



Materials of the Crust of the Earth. 



Simple Bodies ; External characters of Minerals ; Chemical charac- 

 ters. 



Minerals composing the Crust of the Earth ; Order of an-angement 

 of the Materials of the Crust of the Earth. 



Classification of Rocks ; Explanation of Terms. 



Unstratified Rocks ; Stratified Rocks. 



Classification of the work. 



Primary or Non-fossiliferous Strata ; Fossilifei-ous strata. 



Cambrian System ; Silurian System. 



Carboniferous System ; Coal Fields of England. 



Poikilitic (upper red sandstone) System. 



Oolitic System ; Wealden. 



Cretaceous System ; Tertiary System. 



Modern Group, River Deposits. 



Coral Formation ; Igneous Rocks. 



Temperature of the Interior of the Earth. 



Present state of the Geological Theory. 



Summaiy of admitted facts and inferences in Geology. 



Conclusion ; Postscript ; Glossary ; Index. 



The order is good in the main. There are many advantages in in- 

 troducing the igneous rocks and the dynamics of fire first, as we have 

 then all the great agents at our command, for the interpretation of the 

 phenomena of the stratified rocks. The work is neatly got up with a 

 good type, and a paper reasonably white, but too thin and tender, as 

 our American reprints are wont to be ; and we have had much occa- 

 sion to find fault with many republications of foreign works, on account 

 of an inferior and slovenly style, although there are honorable excep- 

 tions. If we will persist in denying copyright to foreign authors, it is 

 at least due to them that their reprinted works should appear in a good 

 style. 



