IV, PREFACE. 



By these aids, as well as by the careful study of a well 

 selected series of minerals and fossils, illustrative of the 

 different periods, it is hoped that the beginner may be- 

 come somewhat acquainted with this interesting branch of 

 Natural Science. 



The List of Minerals, given at page vi., is chiefly taken 

 from the work of the late William Phillips, and may appear 

 too extensive ; it only includes those minerals which are 

 either the components of Eocks, or frequently found im- 

 bedded in them, as well as a few others not hitherto dis- 

 covered in Great Britain. 



I have to acknowledge my obligation toMr.Morris,I'.G.S. 

 for assistance and suggestions in preparing this work, and 

 beg to announce that an elementary work on Mineralogy 

 is in preparation as an accompaniment to it. 



149, Strand, August, 1847. 



