9 
Bureau of Science Service 
batteries, electric furnace reduction of metals, physical chemistry, 
electrochemistry and catalytic production of azo compounds and amines. 
Licensed Professional Engineer, state of Indiana. 
John B. Butcher 
Student, Normal School, two years; Indiana University, two years. 
Graduate student, Indiana University, four years; University of Penn- 
sylvania, one year. B.S., Tri-State College, 1900; A.B., Indiana Univer- 
sity, 1906; A.M., 1907; Ph.D., 1915. Assistant in Physics, Indiana Uni- 
versity, 1906-7; Instructor, 1907-8; Instructor in Physics, University 
of Pennsylvania, 1908-9; Assistant Professor, Indiana University, 1909- 
15; Associate Professor, 1915-23; Professor, 1923 to date. Fellow, In- 
diana Academy of Science. Member of Phi Beta Kappa, Sigma Xi 
(President, 1923), and American Physical Society. 
Mason E. Hufford 
Student, Normal College, two years; Indiana University, two and 
one-half years. B.S., Central Normal College, 1904; A.B., Indiana Uni- 
versity, 1911; A.M., 1913; Ph.D., 1916. Graduate student, Indiana Uni- 
versity, five years; University of Chicago, one-half year; Cavendish Lab- 
oratory, Cambridge, one year (1924-25). Assistant, Indiana University, 
1911-12 ; Instructor, 1912-17 ; Assistant Physicist, Bureau of Standards, 
1917- 18; Acting Assistant Professor of Physics, Swarthmore College, 
1918- 19; University of Utah Summer School, 1920; Assistant Professor, 
Indiana University, 1919 to date. Member of the American Physical 
Society, Indiana Academy of Science, Sigma Xi (President, 1926), and 
Phi Beta Kappa. 
William N. Logan 
A.B., A.M., Kansas University, 1896. Fellow in Geology, Chicago 
University, 1898-1900; Ph.D., 1900. Principal, Scottsville Schools and 
Beloit High School, Kan., 1891-93; Superintendent of Public Schools, 
Pleasanton, Kan., 1896-98. Member of the Kansas Geological Survey, 
1895-96, 1899-1900. Member of Bad Lands Expedition in South Dakota 
for Field Museum, 1897. Member of Wyoming Scientific Expedition and 
collector for Kansas University Museum, 1898. Chapin Professor of 
Geology and Mineralogy, St. Lawrence T University, 1900-3. Field Geolo- 
gist in New England and on New York Geological Survey, 1902-3. Pro- 
fessor of Geology and Mining Engineering, Mississippi Agricultural and 
Mechanical College, 1903-16. Geologist for Experiment Station and on 
State Survey from 1904. Dean of School of Science, 1912-16. Associate 
Professor of Economic Geology, Indiana University, 1916-19; Professor 
of Economic Geology and State 'Geologist, 1919 to date. Head of the 
Division of Geology of the Indiana Conservation Department. Life 
member and Fellow of the American Association for the Advancement 
of Science; Fellow of the Geological Society of America, the Royal So- 
ciety of Arts, and the Indiana Academy of Science. Former member of 
Kansas and Mississippi Academies; Member of Sigma Xi (past Presi- 
dent) , Phi Beta Kappa. Examiner of mineral and mining properties for 
the Indiana Securities Commission. Member of State Geological Surveys 
in Kansas, New York, Mississippi, and Indiana. Investigator of phases 
of geology in more than twenty-five states and countries. Author of 
