432 Scientific Intelligence. 
servations on shooting stars. This work embraces all belonging to what 
alled meteors. The author is under great obligations to the French 
government who, on the recommendation of Arago, placed Mr. Coulvier 
Gravier in a situation to follow his tastes for this sort of observation. 
This observer does not despair of obtaining the means of predicting the 
meteoric periods. He unfolds his theory in a volume which all can under- 
stand, since it is written in a simple style and contains few mathematical 
formulz. It shows that the author has obeyed a controlling taste; and 
his work fills an important gap in astronomical bibliography. 
ours de Mecanique appliqueé par M. Mahistre. 1 vol. 8vo, illustré 
de 211 figures——Mr. Mahistre is professor of Mechanics a la Faculté des 
Sciences a Lille, one of the great manufacturing centers of Europe. His 
admirable work is especially adapted to engineers and to students who 
are destined to industrial pursuits. © 
This first volume treats specially of the strength of materials. Like the 
work of Mahistre, it is particularly adapted to civil engineers; above all 
it interests the engineers of bridges and roads, who in France occupy so 
important a role, particularly in railroad constructions. Multitudes of 
these engineers are found scattered over the continent of Europe, especia ly 
in Russia, Germany, Spain, Switzerland and Belgium, The science of 
the pupil gives evidence of the master, who is Mr. Bresse. 
Cours d’ Electrophysiologie par M. Matieucci. 1 vol. 8yo—This course 
pronounced at the University of Pisa is now reproduced in France where 
e well known high reputation of the author will secure it the attention 
it deserves, : 
Cours d’ Analyse de Ecole Polytechnique par M, Sturm. T. II, in 8v0, 
1859.— We have already announced the first volume of this great math- 
ematician, who died some years ago. It is published by one of his pu- 
pils, Mr. Proutret, by the choice of the author, and from the manuscript 
left by him. This work is of special value to professional mathemat- 
cians, and to those who are charged with the instruction of this science. 
SCIENTIFIC INTELLIGENCE. 
I. CHEMISTRY AND PHYSICS. 
1. On Torsion and its relations to Magnetism — WiEpEMANN has com- 
municated several interesting papers on torsion and its relations to mag- 
netism, from the last of which we extract the following comparative view, 
referring to the original paper for the details of the experimental meth 
employed. 
Torsion. Magnetism. 
_1, The temporary torsions of a 1. The temporary magnetisms of 
wire twisted for the first time by a bar magnetized for the first time 
increasing weights, augment more by increasing galvanic currents, aug 
apic an the weig' ment more rapidly than the intenst 
. ties of these currents. 
