12 PROCEEDINGS OF THE ACADEMY OF [Feb., 



the Geological Survey of Wisconsin from 1876 to 1882. During 

 this time he produced the series of volumes entitled "The Geology 

 of Wisconsin," which at once became the standard work on the 

 geology of that region and is recognized the world over as of very 

 great importance to the science of geology. In 1878, he repre- 

 sented the State of Wisconsin at the Paris Exposition. 



During some years following this time, Doctor Chamberlin was 

 largely engaged in researches in glacial geology, in which he was 

 recognized as the chief authority in America. In 1878, he visited 

 the glaciers of Switzerland; from 1882 to 1907 he was United States 

 Geologist in charge of the Glacial Division of the United States 

 Geological Survey; he was geologist of the Peary Relief Expedition 

 in 1894. Somewhat later, Doctor Chamberlin became associated 

 with the Carnegie Institution of Washington in research work; 

 was a member of the University of Chicago Oriental Educational 

 Investigation Committee in 1909; was Commissioner of the Illinois 

 Geological Survey; and held many other positions. He was the 

 recipient of medals at Paris in 1878 and 1893 in honor of his sci- 

 entific work; and the Helen Culver Medal of the Chicago Geo- 

 graphical Society was bestowed on him in 1910. He is a correspond- 

 ing member of the British Association for the Advancement of 

 Science, and of the London and the Edinburgh geological societies. 



After Doctor Chamberlin had gone to the University of Chicago 

 he took up actively the investigation of some of the most funda- 

 mental problems of geology, the planetesimal hypothesis, the early 

 history of the earth, the history of the atmosphere and other pro- 

 found researches, and he is today recognized as the foremost scholar 

 in the study of the fundamental principles governing the earth's 

 origin and structure. He has written widely on this subject, both 

 in the publications of the Carnegie Institution and elsewhere, and 

 a remarkable volume produced a few years ago by him and entitled 

 "The Origin of the World" shows his wonderfully clear conception 

 of the subject. 



In addition to the publications already mentioned, Doctor Cham- 

 berlin has for over fifty years been a voluminous writer in all the 

 departments of geology to which he has given his attention. The 

 "General Treatise on Geology," written by him and Professor 

 R. D. Salisbury, is recognized as the standard text-book of geology 

 in this country and abroad; and the wonderful ability with which 

 he and Professor Salisbury have edited the Journal of Geology has 

 commanded the admiration and respect of all their associates in 

 the geological profession. 



Professor Chamberlin is a member of the National Academy of 

 Sciences, the American Philosophical Society, and many other sci- 

 entific organizations. He was President of the American Asso- 

 ciation for the Advancement of Science in 1908; President of the 

 Chicago Academy of Sciences in 1898 to 1914; and President of 

 the Illinois Academy of Science in 1907. He is at present Pro- 

 fessor Emeritus of Geology at the University of Chicago. 



