248 Williavi Bulloch Glarh. 



a member of the executive committee of the State Tuberculosis 

 Association and an officer of the Federated Charities. 



Professor Clark was a member of the National Academy of 

 Sciences and chairman of its Geological Section, a fellow of the 

 American Academy of Arts and Sciences, a member of the Phila- 

 delphia Academy of Natural Sciences, Washington Academj^ of 

 Science, American Philosophical Societ}", Deutsche Geologische 

 Gesellschaft, Paleontologische Gesellschaft, and American Asso- 

 ciation for the Advancement of Science. He was a councillor and 

 treasurer of the Geological Society of America, of which he was 

 a charter member, and a foreign correspondent of the Geological 

 Society of London. He was, for several ^^-ears, president of the 

 Association of American State Geologists. Amherst conferred 

 itsLL.D. on him in 1908. In 1897 Professor Clark was an official 

 delegate to the International Geological Congress and spent sev- 

 eral months in an extended trip through Russia. He was abroad 

 several summers and attended the centenary of the Geological 

 Societ}^ of London. He spent the summer of 1906 in Alaska, and 

 traveled extensivel3Mn Mexico and throughout the United States. 

 He was married October 12, 1892, to Ellen Clark Strong of Bos- 

 ton, and had four children, all of whom survive him. 



Professor Clark was eminently social and had the gift of inspir- 

 ing affection in men of all walks of life. His influence on the 

 progress of geology was unique. Starting as a paletuitologist he 

 soon became an authority on the Echinoidea. He was early 

 diverted to more strictly stratigraphical work and prepared a 

 correlation paper on the Eocene for the U. S. Geological Survey 

 on the occasion of the Washington meeting of the International 

 Geological Congress in 1891. After studying the Upper Creta- 

 ceous of New Jersey for the U. S. Geological Survey he attacked 

 the Coastal plain formations of Maryland and Virginia with char- 

 acteristic energy, and the results of this work were eventually 

 embodied in the systematic reports on the Lower Cretaceous, the 

 Upper Cretaceous, the Eocene, the Miocene and the Pleistocene, 

 published by the Maryland Geological Survey. With the multi- 

 plication of administrative duties as head of the Geological 

 Department and member of the Academic Council of the L^ni- 

 versity, as well as the increasing widening of the work of the 

 Maryland Geological Survey, the Weather Bureau, the Highway 

 Commission and the Forestry Bureau, most of his time was 

 engrossed in organization rather than in research, and undoubtedly 

 his greatest monuments are the reports of the Survey he organized 

 and the contributions to Science b}^ a host of younger men who 

 came under his influence^ — dra\Ying material aid as well as inspira- 

 tion from his example and ideals. 



With the outbreak of the war Professor Clark became actively 

 interested in problems of defence and economic preparedness. 

 He was appointed a member of the National Research Council, 

 was chairman of the subcommittee on road materials, and a mem- 

 ber of the committee on camp sites and water supplies. He was 

 also chairman of the committee on highways and natural resources 

 of the Maryland Council of Defense. e. w. berry. 



