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#Mon Aug 09 11:50:40 CEST 2010
Text__jOfj8KObEd-WfYQ0GneCwQ_text=The heliometer is a telescope, whose objective lens is divided. For measuring, both sections are made congruent and the displacement of both lens halves measured.
Text__jOfj8KObEd-WfYQ0GneCwQ_title=