ANNOUNCEMENT

The Journal of Colloid Science is preparing a special issue consisting of ~umbers 4 and 5 of this Volume, dedicated to Sir Eric Rideal. This special issue will appear in September and will contain papers written by his friends and pupils as a tribute to his scientific achievement in the field lof colloid science.

ERRATUM

Volume 11, Number 1, February, 1956. In the article entitled "A Spec- trophotometric Method for the Determination of Cationic Detergents" by A. V. Few and R. H. Ottewill, the legend for Figure 1 on page 36 refers to Figure 3 on page 37. The legend for Figure 2 on page 37 refers to Fig- ure 1 on page 36.

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