Bibliography. 301 



These volumes are illustrated in all, by three hundred and sixty-seven 

 figures. The illustrations are all done on wood, and being executed 

 with great skill and carefully copied upon the printed page of the most 



beautiful paper, they are at once effective for instruction and highly 

 ornamental. 



This work contains a lucid and judicious summary of the facts of 

 the science, with cautious indulgence in theory. We perused it soon 

 after it appeared, and with much instruction and pleasure : nor have 

 we remained silent regarding it from any want of a just appreciation of 

 its merits. We have not observed Prof. Ansled often among the active 

 explorers of geology with whom Great Britain abounds ; but he has 

 proved himself to be a very diligent student of the science, and one 

 of its attractive and successful historians. His learned and elegant 

 work we can therefore recommend to the student of geology as an 

 important addition to his library. It is worthy of a much fuller review 

 and analysis; but as much time has elapsed since its appearance, and 

 it has been extensively noticed in other journals, we now hasten to his 



very recent work, 



World 



The first 



thing that struck us a month since, on the opening of the package from 

 London, was, that a volume had actually dropped down upon us from 

 |he ancient world, and that it is quite a mistake that the art of printing 

 is only four hundred years old. 



In strict keeping with its subject, the covering and external adorn- 

 ments of the volume are in a style of ultra antiquity, while its interior 

 presents fine paper, the best typography, and finished illustrations in 

 one hundred and forty-seven wood-cuts, besides two vignettes— one of 

 tthich is a restoration of the vegetation of the cold period as it existed 

 at that era in England. 



The volume is in the form of a large duodecimo of more than four 

 hundred pages. It is divided under three periods : 



The First, or Ancient Epoch; the Second, or Middle Epoch; and 

 the Third, or Modern Epoch. 



There are in all sixteen chapters; and (1.) an Introductory chapter 

 Unfolds the general structure and physical laws of the planet. 



Under the first epoch the principal subjects are presented in the fol- 

 lowing order : 



2. The period of the prsezoic, or non-fossiliferous or primary rocks. 



3. That of the invertebrate and Silurian rocks. 



4. Early fishes and Devonian rocks, or the old red sandstone. 



5 - Earliest terrestrial plants and the era of coal. 



6 - The magnesian limestone, or Permian system. 

 Under the second epoch : 



7 - The new red sandstone, or Triassic system. 

 ®- Lias and marine reptiles. 



9 - Wealden and land reptiles, and flying reptiles, &c. 



10. The Cretaceous period, with its animals. , 



11. General considerations on the secondary epoch and its ter- 

 mination. 



Under the third epoch : 



12. The introduction of land animals, and the early tertiary. % 



