1822.] Menioires de la Societe de Geneve. 311 



greater part of the Memoirs which had been read before it have 

 been gradually published by their authors in scientific journals, 

 or other works. The Society being, however, of opinion, that 

 several communications which they possessed were worthy of 

 pubhcation, a part of them has now been printed ; and for this 

 we are indebted to the present volume, or rather the first part of 

 a volume. 



The names of those who constitute the Society are sufficient to 

 raise expectations that the subjects treated of will be of such a 

 nature as to interest the scientific reader ; and we think it will be 

 allowed, on perusing the memoirs contained in this volume, 

 that the Society has made a judicious selection of tlie commu- 

 nications presented to them. 



These Memoirs are 12 in number, and, for the present, we 

 must content ourselves with enumerating them, intending to 

 take an early opportunity of making such extracts from the 

 more interesting, as may convey some idea of their respec- 

 tive merits. 



I. Memoir upon some Pecuharities in the Eye of the Tunny 

 (Scomber Thynnus of Linnaeus), and some other Fishes. By 

 Mr. L. Jurine. 



II. Notice respecting the Teeth and Mastication of the Fishes 

 called Carp. By the Same. 



III. On the Effect of the Motion of a refringent Plane upou 

 Refraction. By Mr. P. Prevost. 



IV. Observations upon the Relations which exist between the 

 Axes of Double Refraction, and the Form of Crystals. By Mr^ 

 F. Soret. 



V. Notice respecting Mica. By the Same. 



VI. Memoir on different Physical and Meteorological Instru- 

 ments. By Mr. Peter Huber. 



VII. Memoir on the Fall of Leaves. By Mr. P. Vaucher. 



VIII. Notice relating to the Basaltic Country of the Depart- 

 ments of the Rhine, Moselle, and Sarre. By Mr. M. A. 

 Pictet. 



IX. Memoir on the Charagnes. By Mr. Vaucher. 



X. Essay on the Spermatic Animalculi of several Animals* 

 By MM. J. L. Prevost and J. A. Dumas. 



XI. Memoir on the Natural Affinities of the Family Nym- 

 phsea. By P. M. De Candolle. 



XII. On the Influence of Green Fruits upon the Air before 

 they ripen. By Mr. De Saussure. 



