Optically‐compensated variometers and wide‐range recorders to be used during the Jubilee Polar Year

Abstract

When the project was mooted of making a world‐wide series of scientific observations during 1932–33, which will be the fiftieth anniversary of the first Polar Year, the question of the magnetic instruments suitable for use in polar regions had to be given careful thought. The problem of transportation is serious and requires that the minimum possible weight of building materials be taken, with consequent restriction in the size and insulation of the observatories. Fortunately for the scientific expeditions which will proceed to the polar regions, Dr. B. la Cour, of the Danish Meteorological Institute, who is President of the International Polar Year Commission, and his associates had realized the lack of appropriate magnetographs and had designed apparatus adequate for the purpose.