Question:
Which employer did Sydney Chapman work for in Jul, 1953?

Context:
 Sydney Chapman works for Royal Observatory from Jan, 1910 to Jan, 1914. 
 Sydney Chapman works for University of Alaska Fairbanks from Jan, 1953 to Jan, 1954. 
 Sydney Chapman works for High Altitude Observatory from Jan, 1955 to Jan, 1955. 
 Sydney Chapman works for University of Cambridge from Jan, 1914 to Jan, 1919. 
 Sydney Chapman works for Imperial College London from Jan, 1924 to Jan, 1946. 
 Sydney Chapman works for University of Oxford from Jan, 1946 to Jan, 1953. 
 Sydney Chapman works for Victoria University of Manchester from Jan, 1919 to Jan, 1924.

Answer:
University of Alaska Fairbanks