The height, h, and the distance from the wall, 1, where the potential is measured are given in metres when known.
So again, a few days' observations on the top of Mont Blanc (4810 metres) by le Cadet (26) in August and September 1902, showed only a single period, with maximum between 3 and 4 P. M., and minimum about 3 A.M.
He found the gradient nearly uniform for heights up to 30 to 40 metres above the ground.
H is the height in metres, P the gradient in volts per metre.
How would you define metres? Add your definition here.