As already announced, the Gold Medal of the Royal Astronomical Society has been awarded to Dr. H. Spencer Jones, Astronomer Royal, for his determination of the solar parallax from observations of the minor planet Eros, made at the very favourable opposition of 1931. The solar parallax is a fundamental unit and is the astronomer's disguise for the principal astronomical unit of distance, namely, the mean distance of the earth from the sun. Dr. Spencer Jones' result for the solar parallax (v. Man. Not. Boy. Ast. Soc., 101, 356 ; 1941) is 8-790" ± 0 -001" and the corresponding mean distance of the earth from the sun is 93,003,000 miles ; in each case the accuracy is of the order of 1 part in 10,000. Such an achievement is remarkable, and the Society's award will be acclaimed by astronomers all over the world as an honour deservedly bestowed and brilliantly earned.