Show Magdeburg Hem In 1654 Otto von Guericke of at Magdeburg Magdeburg Magdeburg Mag Mag- deburg performed an nn experiment before before before be be- fore the Imperial diet at In which he took two hollow hemispheres hemIspheres hemispheres hemi hemI- spheres of ot copper or brass rubbed the edges with grease fitted them clos closely together exhausted the air I In the globe thus formed through a stopcock In on one of tb the tho hemispheres and showed that the hemispheres were held beld together with tremendous force With hemispheres a foot toot In diameter this force is L approximately one ono ton tOD L 1 |