REVIEWS. 
263 
to have appvctiiited fully the proper ohjects of a local itinsciim, ami have V.oldly and 
wisely di-awii attciitum to this point. Several new cases have been added to the 
geological department, and, by a recent arrangement, space has been obtained lor 
additional specimens, which are now therefore desiderata. An application to the 
(ieological Survey of Great Britain has been liberally responded to by a present of 
a lartre number of fossils from various formations ; and 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 Tcrtiaries, and any fossils from the Hemp- 
stead and Uembridge series and Sccniee limestone, from Cowes, l!yde, and Hcadon 
Hill, Isle of Wight, from Hordwell, Hampshire, and from Brackleshaui Bay, in 
Sussex, will be very acceptable. Of the Cretaceous group and Upjier and Lower 
(Jrcensands, fossils are still wanted. There are, in the museimi, but few Oolite 
fossils. In the Devonian system there are only half a do/en specimens from the 
Old Red Sandstone, and there are scarcely any from the Lower Silurian." The 
Geological Collection referred to is an excellent and instructive one, and deserves 
to have these deticicncics remedied. An account of the meetings of the Field 
Club, during the last year, dctaiied in this report, were given ill the GEOiOGlST 
of February last (No. 11., p. 77-80). 
EE VIE WS. 
The Student's Manual of Geology. By J. Beete .Tukes, M.A., F.K.S., Local Di- 
rector of the Geological Sm'\ cy of Ireland. Edinbm-gh : Adam and Charles 
Black. 
"EAELTinthe year 1854," writes Mr. Jukes in his preface, "the late Edward 
Forbes asked me to be his fellow-labom-er in wTiting the article on geology in the 
new edition of the ' Eucyclop:cdea Britannica,' and a text-book to be founded on 
it." This was the origin of the present work, now, alas ! completed ^nthout the 
aid of that master-spirit whose loss this generation of British geologists will never 
cease to deplore. 
The author separates his whole subject into three divisions — (1) Geognosy, (2) 
Paleontology, and (-3) The History of the Formation of the Series of Stratified 
llocks. In using the term geognosy, so common among contuiental geologists, 
Mr. Jukes restricts the meaning within narrower limits, for he describes it as 
" the study of the structure of rocks independently of their arrangement into a 
chronological scries," while German 'geologists include the eonsidei-ation of the 
chronology of rocks hi 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 structure, the mineralogical composition, the textm-e, 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, then- position, 
and mutual relations, and other characters that can only be studied in the field, 
but without entering on the cpiestion of the geological time of their production." 
This first division of Mr. Jukes' work is characterized by much special information 
and by many peculiar excellences. 
The second and third divisions, without being marked by any very novel fcatm-e, 
are excellently arranged, and to the student, or, indeed, to any geologist, afford 
an invaluable means of ready reforeuce. The former, paleontology, although 
