PROCEEDINGS OF THE CENTENARY MEETING. xci 



Imp. Moskofskoie Obshchestvo Iestestvo-Ispytatelei. 



Moscou le 20 February, 1912. 

 To The Academy of Natural Sciences of Philadelphia: 



The Imperial Society of Naturalists of Moscow, founded in 1805, has had the 

 pleasure to see the development of The Academy of Natural Sciences of Phila- 

 delphia at the beginning to the present time and is able to fix the great success 

 of the Academy during the past hundred years in cultivation of the natural 

 sciences. Our Society very much regrets that the great distance makes it im- 

 possible to be represented at the celebration of the Centenary Anniversary of the 

 Academy. 



On behalf of the Imperial Society of Naturalists of Moscow, I take the 

 opportunity of offering sincere and hearty congratulations, and of expressing 

 our deep appreciation of the great services that the Academy at Philadelphia has 

 rendered to natural sciences during the last hundred years, and our hope that its 

 activity may long continue in the future. 



President : 

 Prof. Dr. N. Umoff, 



Secretaries: 

 Prof. Dr. E. Leyst, 

 V. Deinega. 



