REVIEWS 



26a 



to have appreciated fiilly the proper oVjccts of a local nniseiTin, and have holdly atid 

 wisely di'awn attention to this point. Several new cases have ^cen added to the 

 geological department, and, by a recent arrangement, space has l>een ol.tahied ibr 

 additional specimens, which are now therefore desiderata. An a.pplication to the 

 Geological Survey of Great Britain has been lil^erally respor.ded to In' a present of 

 a large miniber of fossils from various formaticns : raid a series of Hampshire Ter- 

 tiary fossils has been presented by K. Chattock, Esq. '• Still, any further addi- 

 tion," the report says, " to the Eocene Tertiaries, and an.y fossil- iiom the Hemp- 

 stead and Bembridge series and Sconce limestone, from Cowes. Eydo, and Headon 

 Hill, Isle of Wight, fr'om Hordwcll, Hampshire, and from Bracklcsham Bay, in 

 Sussex, will be very acceptable. Of the Cretaceous group and Upj'icr and Lower 

 Greensands, fossils are still vantcd. Tlierc are. in the museum, but few Oolite 

 fossils. In the Devonian system ilaro ::ro culy hr.lf a do/eu specimens froiii the 

 Old Red Sandstone, and therf are soar -cly any from_ the L<nvc-- >Silurian."' Tlie 

 Geological Collectl"ii ixron i. jI to i- ;!u exccllcut and instructive one, and deserves 

 to have these deliLicucic- rouic-licd. An. account of the meetiugs of the Field 

 did), during the last year, detailed in this report, were given in the Geolo&ist 

 of February last (Xo.'ll., p. 77-SO). 



E E Y I E W S. 



The Studerd's Manual of Geology. By J. Beete Jukes, M.A., F.R.S., Local Di- 

 rector of the Geological Sm-vey of Ireland. Edmbiu-gh : Adam and Cliarles 

 Black. 



"EAELTinthe year 1854" "^Tites Ivlr. Jukes in his preface, "the late Edward 

 Forbes asked me to be his fellow-labourer in writing the article on geology in the 

 new edition of the ' Encyclopsedea Britamiica,' and a text-book to be fomuled on 

 it." This was the origin of the present work, now, alas ! completed without the 

 aid of that master-spirit v.diose loss this generation of British geologists Avill never 

 cease to deplore. 



The author separates his whole subject into three divisions— (1) Geognosy, (2) 

 Paleontology, and (3) Th.e History of the Formation of the Series of Stratified 

 Iwocks. In using the term geognosy, so common among continental geologists, 

 Mr. Jukes restricts the meaning within narrovrer limits, for he describes it as 

 '•' the study of the structure of rocks i'.id-poudeiicly of tlioh- arrangement mto a 

 chronological series," while German geologists include the consideration of the 

 chronology of rocks in the term. Geognosy he again divides into two parts — 

 lithology and petrology — which he thus defines : " By Lithology I would mean the 

 study of the internal structiu-e, the mineralogical composition, the texture, and 

 other characters of rocks, such as could be determined in the closet by the aid of 

 hand-specimens. Under Petrology I would arrange the larger characteristics of 

 rocks, the study of rock-masses, their planes of division, then' forms, their jjosition, 

 and mutual relations, and other characters that can only be studied in the field, 

 but without entering on the question of tlie geological time of their production." 

 This first division of Mr. Jukes' v.'ork is characterized by much special information 

 and by many peculiar excellences. 



The second and third divisions, without being marked by any very novel feature, 

 are excellently arranged, and to the student, or, indeed, to anv gcolo::j-ist, aiiord 

 an invaluable means of ready reference. The former, paleontologv, althotteh 



