This is very cool I found on handshape shadowing manual from the 1800's.... You will have to scroll downwards to see the pictures for yourself and enjoy trying them out. It's really neat and cool....
http://www.gutenberg.org/files/12962/12962-h/12962-h.htm
http://www.gutenberg.org/files/12962/12962-h/12962-h.htm

