Magnetic observations at Agincourt and Meanook, May 29, 1919

[The data supplied for the Agincourt Magnetic Observatory, near Toronto, Canada, consisted of eye‐reading values of magnetic declination ( D ), horizontal intensity ( H ), and vertical intensity ( Z ), for every minute, 9 h 58 m to 16 h 32 m , Greenwich civil mean time, May 29, 1919. For the Meanook Magnetic Observatory similar data could be supplied only for D . Tables 1 and 2 contain the derived five‐minute means. Furthermore, the mean diurnal variation for May 28 and 30, 1919, was transmitted (Table 3). Later were received also the hourly magnetograph values for May 28–30, 1919, from which Table 4 was derived.