people
Typewritten
  Typewritten letter, 1 page
  Typewritten letter, 1 page
  Rquest for advice regarding potential project
  Discussion of Paul Weiss's contributions to science
  a letter and its translation in which Hans Spemann dicusses meeting the correspondant, Woods Hole, Frank Rattray Lillie, and scientific techniques
  a letter and its translation in which Hans Spemann dicusses his published works, congratulates his correspondant on his work keeping frog embryos alive, and mentions salamander embryo work
  a letter and its translation in which Hans Spemann dicusses their personal lives, his work, his book, and Holtfreter
  Handwritten
  Handwritten, Typewritten
  Typewritten
  
         










