GENEVA SOCIETY OF PHYSICS AND NATURAL HISTORY. 227 



supply of our Memoirs, it was decided that there should no longer be a 

 general distribution, but that the members and associates should be ad- 

 vised, as soon as a volume appeared, that it could be obtained at a cer- 

 tain place appointed, and if not claimed at the end of two years it would 

 be at the disposal of the society. This decision does not affect the dis- 

 tribution of our Memoirs abroad. 



The committee of publication has been charged to make every eflFort to 

 obtain for the society former volumes necessary to complete our series. 



The society has published during the past year the second part of 

 volume XXIY of its Memoirs, containing articles by M. Plantamour and 

 M. de Loriol. To this must be added the first part of volume XXV, con- 

 taining a memoir of M. H. de Saussure ; and we have still in press the first 

 part of volume XXVI, containing memoirs of M. Duby upon new species 

 of mosses, of M. E. Favre upon the geology of the Crimea, and other 

 interesting matter. 



In regard to the memoirs in competition for the prize founded by A. 

 P. de Candolle, to be presented in 1879, the society caused the following 

 notice to be published in various journals {Archives des sciences pJiyslques 

 etnaturelles* March, 1877). 



" Prize toukded by Augustin Pyramus de Candolle for the 



BEST monograph UPON A SPECIES OR A FAMILY" OF PLANTS. 



"A competition is now opened by the Societe de •pliysique et dliistoire 

 naturelle de Geneve for the best unpublished monograph of a species or 

 family jof plants. 



"The manuscripts may be written in Latin, French, English, or Ital- 

 ian. They must be sent, postage paid, before the 1st of October, 1879, 

 to Professor de Marignac, corresponding secretary of the society at 

 Geneva. Members of the society are not admitted to the competition. 



" The prize is 500 francs. It may be reduced or not awarded in case 

 the articles do not correspond to the conditions of this notice. 



"Geneva, February, 1877. 



"A. Favre," 

 President of the Society. 



III.— LABORS OF THE SOCIETY. 



]. Physics. — Professor Plantamour has given an account of a work pub- 

 lished by him with Professor Wolf, of Zurich, upon the telegraphic deter- 

 mination of the difference of longitude between the observatory of Zurich 

 and the astronomical stations of Pfandler (near Bregenz) and of Gabris 

 (Appenzell). The astronomer Oppolzerassisted in this work. Duringthese 



* In future we will mention this review simply as Archives. 



