As Dauto points out, if the field lines were intended to represent fixed intervals of magnetic intensity ( like the 100'foot contours on a map that are equally spaced in height ) then they wouldn't be uniformly spaced in the first place.
12.
During the conference, there were numerous tours and briefings held on " Silas Bent " describing, for the ocean scientists of the world, her capabilities for measuring bathymetric depth, magnetic intensity, gravity, surface temperature, seismic reflection, sound velocity, ambient light, and salinity.
13.
Intrigued by terrestrial magnetism he recorded observations of fluctuations in magnetic intensity in various parts of Sweden, and was charged by the Stockholm Academy of Sciences with the task, not completed till shortly before his death, of working out the magnetic data obtained by the Swedish frigate " Eugenie " on her voyage around the world in 1851 to 1853.
