The frontispiece of the first edition is by Claudio Dagli. It depicts the double-headed imperial eagle of the Hapsburg dynasty. It hangs by a magnetised chain from the imperial crown that supports an orb and a cross. Both the crown and the cross are struck through with magnetised arrows pointing towards a heavenly source, but not directly at the all-seeing eye of god directly above - perhaps a reference to magnetic declination. In one of its claws the eagle holds the crowns of Austria, Hungry and Bohemia, held together by magnetism, while in the other it holds the sceptres of the three realms, similarly linked by magnetic force. Arrows from the bird's outstretched wings project imperial power to the lands below. A lodestone on the eagle's breast carries the dedication to Emperor Ferdinand III and a banner above the eagle's head carries the Latin motto Regna Quis Adiunxit Regnis Nova Sceptra Coronis ("He has added kingdoms to kingdoms and new sceptres to crowns"). A second banner curling around its feet carries the Latin pun Et Boreae Et Austri-Acus (""Needle of the north and south - 'austriacus' also meaning 'Austrian'). In the third edition the dedication to Ferdinand III is replaced on the breast of the eagle by his portrait.