Hermann and Robert Grassmann – Free digital copies of books


Some of the original works by Hermann Grassmann and his brother Robert plus an early Grassmann biography by Victor Schlegel (1878), collected by Hans-Joachim Petsche (Potsdam, Germany) with the help of  Sebastian Berchtold.

1) Hermann Grassmann (mathematical and physical works):


2) Robert Grassmann:

3) Victor Schlegel:

Sources: Email by H.-J. Petsche (17 April 2009
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