PREFACE. V 



grand American book, his Manual of Geology. Then there are the 

 books of Lyell, Hitchcock, Hugh Miller, Phillips, Gray and Adams, 

 Richardson, etc. I mention with special pleasure some smaller 

 works from the English press. " The Past and Present Life of the 

 Globe," by Page, is a most able and interesting commentary on the 

 life-record of the earth's formation. " Geology in the Garden," by 

 Rev. Henry Eley, shows in a very ingenious manner what may be 

 learned about English Geology by following out the suggestions de- 

 rived from the examination of the soil of a garden. One of the 

 best books for a beginner that I have met with is the "School Man- 

 ual of Geology, "by Mr. Jukes, local director of the geological sur- 

 vey of Ireland. It would be well for the teacher to have some of 

 the books which I have mentioned for the purpose of reference, so 

 that he may, if he wishes, bring up additional matter in his teach- 

 ing, or answer any inquiries of his pupils on points that may not be 

 fully treated in this book. This would be in consonance with the 

 principles I laid down in the preface to my Natural History in regard 

 to the relative use of text-books and books for reference. 



I may say of this book as I said of Part II., that in the present 

 state of education it is adapted to high schools and academies ; and 

 yet it would be within the grasp of the older pupils of our common 

 schools if they had studied in their proper time all the other books 

 of the series, for this is no greater height than is reached in some 

 other branches, where all the steps of the gradation are taken from 

 the beginning, as, for example, in Mathematics. 



That such studies as are provided for in the series, of which this 

 is the concluding book, should be pursued, to some extent, before 

 arriving at the high school or the academy, is very clear, if you con- 

 sider the fact that the majority of pupils end their education when 

 they pass from the higher classes of the common school. Most of 

 these engage in various arts and trades, and so have to do constantly 

 in the business of their life with the principles that are learned in 



