The Fundamental Free Mode of the Earth's Inner.

In the paper entitled "The Fundamental Free Mode of the Earth's Inner Core," by Louis B. Slichter, which appeared in the February issue of this volume, the author wishes to make the following corrections: On page 186, 4th line from the bottom, the stated value of the gravitational response associated with the suggested oscillation is too high; read "0.1" (not "0.64") IM gals. The associated amplitude is then about 8 cm and the associated energy is about 3 X 1021 ergs, or only 0.03 per cent of that released in the quake. On page 188, 13th line from the bottom, the maximum local velocity for the core mode under discussion is about 1 X 10-2 cm/sec, i.e. about the same as the fluid velocity associated with secular magnetic changes. On page 189, line 8, read " a/2a," not "r/2 t."