It is to such a person that I would like to pay this tribute. Eva Disheroon of Pepperell. MA. has been my friend. a supporter and many times a conscience to me during my public life. More than that. Eva. who died on April 10. 1984. has been a dear member of the Tsongas family. She was born in 1908 in Leipzig. Germany. and came to the United States on a student visa in 1936. Gifted with a brilliant intellect. Eva received her masters degree in physics from the Massachusetts Institute of Technology where she was the only woman in her graduating class.