William Gilbert's Dip Instrument for measuring the dip of the magnetic field. The diameter of the dial was "six fingerlengths". The instrument was made of wood and brass,with a steel needle magnetised by hand rubbing with a lodestone. The illustration was published in Gilbert's book De Magnete,first published in 1600. This picture was taken from the second edition reprinted in 1628 | |
Licence : | Droits gérés |
Crédit: | Science Photo Library |
Taille de l’image : | 2683 px × 3425 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |