Beviews — Jtckes' Studenfs Manual of Geology. 79 



what has been his special line of research, and what have been his 

 opportunities for study. If his training has been essentially geologi- 

 cal, mineralogical, or palEeontological, whether in the field and 

 abroad, or only in the cabinet and at home, so shall we find a 

 certain prominence of character given to one or other of these 

 branches of inquiry, and broader or narrower views entertained. 



Imbued as he was by Sedgwick, in his early days, with a love of 

 the science of Geology, Prof. Jukes prosecuted his favourite study on 

 all occasions, and the opportunities which he had by extended travel 

 and by a large amount of detailed geological Survey- work, carried on 

 both at home and abroad, gave him peculiar advantages as the writer 

 of a geological manual, which we naturally find to be admirably 

 adapted to the wants of the student. Since the publication of the 

 first edition in 1857, Jukes's Manual has ranked foremost in this 

 country as a geological hand-book ; for while the works of other dis- 

 tinguished geologists, especially those of Sir Charles Lyell, have 

 contributed more to further the progress of the science, and would, 

 many of them, certainly, have attracted more readers, still no book 

 was better adapted than Jukes's for a class-book for students taking 

 up geology as a special subject, or as a guide (though a somewhat 

 bulky one) for the traveller. 



We need not go into the history of the present Manual, of which 

 we have now the third edition, further than to remind our readers 

 that it sprung, like several other scientific manuals, from an article in 

 the Enci/dopcedia Britannica, which appeared under the heading 

 " Mineralogical Science." Nine years having elapsed since the publi- 

 cation of the second edition, the progress of geology has necessitated 

 great changes ; indeed. Prof. Geikie remarks that so many changes 

 have been made, that the present edition may in some respects 

 be regarded as a new book. A large mass of additional material 

 has been inserted; but by the use of smaller type, this has been 

 effected without adding much to the bulk of the volume. This task, 

 undertaken by the Editor at Mr. Jukes's special request, shortly be- 

 fore his death, could scarcely have fallen into better hands than those 

 of Prof Geikie, whose name is a sufficient guarantee for the manner 

 in which it has been carried out. 



The chapters (ii. and iii.) entitled "Lithology" and "Eock- 

 forming Minerals " have been entirely re-written by Dr. Sullivan, 

 and contain a vast amount of useful information ; they seem, how- 

 ever, to go rather too deeply into the subject for the purpose of the 

 student, making it very difficult and long, there being double the 

 number of pages, and at least treble the amount of matter, intro- 

 duced, as compared with the second edition. This coming first, is apt 

 to discourage the beginner. 



The Lithological portion, part of which had been revised by Mr. 

 Jukes, has received much additional information from the Editor, 

 and is thus rendered of greater value to the student. A novel 

 feature in this edition is the separation of a part into "Dynamical 

 Geology ; " it includes chapters on the form and internal condition 

 of the earth, the movements of upheaval and depression of the earth's 



