This collection is a typewritten manuscript written for Biology 22 at Harvard University by Dorothy Bliss, entitled "The Mechanics of Bird Flight: A Report Based on a Seminar Presented on October 14, 1947". The manuscript summarizes a lecture on bird flight mechanics, including hand-drawn diagrams in the last pages. Corrections and edits in pen are present, possibly from Bliss or Boston Society of Natural History staff member, although not certain.