Some Important Contributions:
Demonstrated that radioactivity is not destroyed either by
heat or by ionization due to chemical reactions.
Showed that radioactive materials behave qualitatively
and quantitatively differently from phosphorescent
materials.
Some Important Publications:
 "Effect of Heat on Excited Radioactivity," Physical Review, Series 1,
16:300(1903).
"On the Nature of Certain Radiations from Sulphate of Quinine,"
Physical Review, Series 1, 18:135(1904).
This paper clearly distinguishes phosphorescence, a chemical process, and other such atomic processes from
naturally occuring radioactivity which is now known to be owing to nuclear reactions.
Honors
Fellow, American Physical Society
Fellow, Mathematical Society
Fellow in Mathematics, Bryn Mawr College 1896-97
European Fellowship, Association of Collegiate Alumnae, for study at Goettingen and at the Polytechnik Institut in Zurich.
Jobs/Positions
1897-11 Head, Physics Department, Goucher College.
1902-03 Research student in McDonald Laboratory, McGill
University (graduate study with Rutherford while on leave
from Goucher College).
1904-06 Research student, Cavendish Laboratory in Cambridge University (on leave from Goucher College).
1911-13 Researcher(?), School of Education,
University of Chicago (studied psychology and eugenics).
1913-16 Professor of Physics and Dean of Women, Grinnell College.
1914-16 Professor of Mental and Physical Hygiene, Grinnell College.
1916-18 Associate Professor of Physics and Dean of Women,
University of Illinois.
1918-22 General Secretary, YMCA, New York.
1920-21; 1923-28 Special Teacher, Physics, Lincoln and
Brealey Schools, New York.
1922-23 Head Mistress, Phoebe Ann Thorne School, Bryn
Mawr.
1928-31 Physics teacher, Roycemore School, Evanston, IL.
Education,
B.S. Northwestern University 1894
M.S. Northwestern University 1895
Ph.D. University of Pennsylvania 1909
Sources and References  consulted
Loretta Johnson and
[1 CLH], [35 MRC],
See also The Grinnell Review October 1913,
Grinnell College Bulletin 1913-16, and American Men of
Science 1921 and 1927.
Submitted by:
Byers/Moszkowski/C. W. Wong
<byers@physics.ucla.edu>
Original citer's name:
Loretta Johnson
<johnsolm@lark.cc.ukans.edu>
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