----------------- HES POSTING ----------------- >From the lack of any response to my query, I deduce that any pre-20th- century occurences of the Earth - spaceship analogy are indeed obscure. The instance I had in mind when posting my question was Henry George, _Progress and Poverty_, Book IV, Chapter II. Yuri Tulupenko ------------ FOOTER TO HES POSTING ------------ For information, send the message "info HES" to [log in to unmask]