OBSERVATIONS AT THE SUMMIT OF MONT BLANC. 247 



various methods of investigation of Martins, Bravais, and Le Pileur, 

 of Tyndall, Hodgkinson, Soret, Violle, and, more recently, M. A^allot. 



But it mnst be confessed that those researches wonld have given 

 results still more important, in view of the science and talents of their 

 authors, if the latter had had a better installation for their iustrnmeuts. 

 Now that the observatory is built, and that it will soon ofiter a com- 

 fortable sojourn, nothing will any longer prevent all the results that 

 are to be expected at this station from being reached, 



A fine and copious scientific harvest is to be reajjcd. Let us invite 

 to it the scientific men of all countries, and we shall thus adhere to the 

 constant tradition of France, who has always loved to take the nations 

 into iDartnership in her endeavors after progress and light. 



