For all those who like history and contraptions, read these ideas for = seismic stuff. http://www.gutenberg.org/files/13962/13962-h/13962-h.htm Great fun, and maybe some new (old) ideas.For all those who like history and = contraptions,=20 read these ideas for seismic stuff. http://= www.gutenberg.org/files/13962/13962-h/13962-h.htmGreat fun, and maybe some new (old)=20 ideas.Ted