310 Geological Society :— 
general physical and chemical properties, elementary thermometry 
and other processes of measurement, and contains a somewhat more 
detailed study of oxygen, hydrogen, nitrogen, carbon, and their 
simpler compounds. We shall look forward with interest to the 
appearance of the second volume. : 
Allerlet Methoden, das Wetter zu prophezeien. Von J. M. PERNTER. 
Mit 8 Abbildungen im Texte. Wien, 1903: Selbstverlag des 
Vereines zur Verbreitung naturwissenschaftlicher Kenntnisse. 
Pp. 36. 
THis pamphlet gives an interesting account of the various theories 
and methods relating to weather forecasts, including the method 
followed by meteorological offices. It is the substance of a lecture 
on the subject recently delivered by the author. 
La Science et VHypothése. Par H. Potncart, Membre de UInstitut, 
Professeur a la Faculté des Sciences de VUniversité de Paris. 
Paris: Ernest Flammarion. Pp. 284. 
To those who are fond of examining critically the foundations of 
science, and probing things as deeply as the limitations of the 
human intellect will allow, this suggestive book by the celebrated 
French mathematician will be full of interest. The logic of the 
mathematical and physical sciences is here subjected to a searching 
and minute criticism, and the author shows that in connexion 
with the so-called definitions of the fundamental notions of 
dynamics as well as other branches of science, the vicious circle 
is of much more frequent occurrence than is generally supposed 
to be the case. Difficulties are frequently raised and discussed, 
and the shortcomings of the classical mode of treatment pointed 
out, without any attempt at substituting a more perfect treatment 
—perhaps because of the impossibility of doing so. The book is 
extremely suggestive and stimulating. The value and limitations 
of hypothesis as an instrument of research are specially insisted 
on. The author’s views are illustrated by a detailed application 
to the history of optics, electrodynamics, and Maxwell’s theory. 


XXXV. Proceedings of Learned Societies. 
GEOLOGICAL SOCIETY. 
[Continued from p. 80. ] 
December 16th, 1903.—Sir Archibald Geikie, D.C.L., D.Sc., Sec. R.S8., 
Vice-President, in the Chair. 
HE following communications were read :— 
1. ‘The Igneous Rocks associated with the Carboniferous 
Limestone of the Bristol District.’ By Prof. Conwy Lloyd Morgan, 
._ LL.D., F.R.S., F.G.S., and Prof. Sidney Hugh Reynolds, M.A., 
EGS 
Evidence for the contemporaneous origin of the igneous rocks is 
given for the following localities :—Middle Hope, or Woodspring ; 
tn 
