1864. | Pamphlets. 731 
“2nd. The great dissimilarity between the properties of the imponder- 
ables and those of vitality. 
“3rd. The difficulty arising from the hypothesis that the embryo of a 
living thing is developed only by agencies analogous with known forces, 
“The permanence of form and structure observable during many gene- 
rations of the same species. 
“5th. The absence of any indications as to what becomes of the vital 
principle of death. 
“6th, The periodicity of life.” 
Natura History mn JENA.* 
We have received the second part of the first volume of a new medical 
and philosophical journal, edited by the Medico-Natural Philosophical 
Society of Jena. The professors in the small Thuringian University 
are evidently determined not to be outdone by their brethren in Wiirz- 
burg, Munich, and other German seats of learning. From the character 
of the Society under whose auspices the journal appears, the articles 
have a more many-sided aspect than is possessed by the papers in the 
well-known ‘ Zoological Zeitschrift’ of Siebold and Kolliker ; by the 
‘Pathological, Physiological, and Practical Medical Archive’ of 
Virchow, or the ‘ Anatomical and Physiological Archiv’ of Miller, 
now edited by Reichert and Du Bois-Reymond. Accordingly we find 
in it articles, On Organic Chemistry, by Alsberg, Geuther, Reichardt, 
and E. Schultze; On Physiology, by Von Bezold; On Anatomy, by 
Gegenbaur ; and on various topics bearing on Practical Medicine and 
Surgery by Gerhardt, B. 8. Schultze, F. Ried, and Schillbach. From 
the established scientific and practical reputation of several of the 
above writers we may feel assured that, if the journal is continued in 
the same spirit with which it has been commenced, it will form a 
desirable accession to German periodical literature. ‘This blending of 
the scientific with the practical in the pages of the same publication 
is not without its advantages, not only to the practitioners of medicine 
and surgery, but to all men who in the pursuit of their daily bread 
have to follow out the details of their art without perhaps making 
much reference to the scientific principles on which it is based. It 
serves constantly to keep before them the important fact that the two 
ought never to be dissociated. . 
We would especially recommend to the notice of our readers the 
article, On the Influence of the Spinal Cord on the Circulation in the 
Mammalia, by Von Bezold, the Professor of Physiology in Jena, 
known as one of the most able of Du Bois-Reymond’s pupils, and author 
of a Memoir on Innervation of the Heart; the paper, On the Epis- 
ternal Arrangements of the Skeleton in Man and Mammalia, by Gegen- 
baur; the article, On Acetal, by Alsberg; and the Account of a Case 
of Resection of the entire Upper Jaw, by Ried. 
* «Jenaische Zeitschrift fiir Medicin und Naturwissenchaft.’ Leipzig. W. 
Engelmann, 1864. 
