lxxx PROCEEDINGS OF THE CENTENARY MEETING. 



K. k. Geologische Reichsanstalt, Wien. 



Die kaiserliche konigliche Geologische Reichsanstalt begriisst auf das herz- 

 lichste die Academy of Natural Sciences of Philadelphia zur Feier ihres hundert- 

 jahrigen Bestandes und begliickwunscht dieselbe zu der Summe von Arbeit, 

 welche wahrend dieses Zeitraumes geleistet worden ist, in der Hoffnung, dass 

 die Bestrebungen der Akademie in weiterer Zukunft von gleichem Erfolge be- 

 gleitet sein werden. 



Der Direktor, 

 Dr. Emil Tietze. 



Wien, im Marz 1912. 



Beautifully engrossed on artistically decorated folio sheet. 



Geologists' Association of London. 



University College, London. 



The Geologists' Association of London which has recently celebrated its 50th 



Anniversary sends its cordial Greetings to The Academy of Natural Sciences of 



Philadelphia on the completion of a hundred years of its successful existence 



during the course of which its publications have made known to the world 



numerous and important contributions to every branch of Natural History 



including Palaeontology in which, as is natural, this Association feels most 



keenly its indebtedness to the good work which the Academy has done. 



John W. Evans, 



President. 

 9th March, 1912. 



Engrossed on parchment 



