290 
rOPDLAR SCIE^XE REVIEW. 
tlie types of Crustacea, 'W'itli an observation of minute detail and a dovetailing 
of little points of evidence wortliy of Mr. Darwin himself. He has shown how 
the law of natural selection is the only one which makes chaos order. The 
book is illustrated by nearl}' seventy excellent woodcuts intercalated with 
the text. The translation is exceedingly clear, and Mr. Dallas must be 
congratulated by the Darwinians for reproducing so thoroughly able a 
defence of their principles. 
DELIQUyE AQUITANICyE.* 
T HIS splendid work, which is still in progress, continues to be of the 
highest interest to the student of prehistoric Archaeology. It is most 
luxuriously “got up,” and the illustrations in quarto, on toned paper, and in the 
best style of French lithography, cannot be surpassed. The first of the two . 
parts on our table treats on the fauna of Cro-Magnon, and includes a minute < 
account of the skulls and bones. The plates contain figures of a number j 
of flint implements, of some remarkable mortar-stones, and a beautiful folio 
drawing of a peculiar perforated weapon made from an antler, and whose r 
use is certainly problematical. The second part contains the description of ' 
the Cro-Magnon skulls and bones, supplying numerous careful measurements. 
Of its five plates three include figures of flint weapons, and two are exceed- ^ 
ingly pretty landscapes illustrating the Itoc deToyne and the Chateau des \ 
Eyzics. This monograph will be completed in about twenty parts, so that it ; 
is now nearly half finished. "When bound, it will be the most elaborate 
archoeological memoir ever published. 
HOW TO WORK IN THE LABORATORY.t 
‘IT/'E quite agree with Professor Bloxam when he says that it often 
^ ' happens that students are kept so long at the examination of the 
tests for individual elements, that they either tire of the subject, or else fail 
1 3 recognise the properties of these elements when converted into salts. Such 
n system, says the author, though teaching the student to discover, for 
example, that a given salt contains potassium and nitric acid, fails often to 
instruct him that these constitute saltpetre, and does not acquaint him with 
the appearance and other properties of saltpetre, by observing which he may 
be sure that liis analysis is correct. This is only too true ; and it often 
liappens, as its consequence, that the wrong acid and bases arc united in the 
imagination of the young chemist, and thus very absurd conclusions arrived 
• “ Reliqum .Vquitanicae, Contributions to the Archaeology and Paloeon- 
tology of P<*rigord.” By E. Lartet and II, Christy. Edited by T. Rupert 
.Jones. London : Bailliere, Parts 8 and 9, April and May, 18(59. 
t “ Laboratory Teaching; or, Progressive Exercises in Practical Chemis- 
try.” By (’. L. Bloxam, Professor of Practical Chemistry in King’s College. 
l»ndon : Churchill, 1809. 
A 
