TABLE III 48 EFFECT OF ADSORPTION WITH ANTI-HUMAN IgE ON ?K TITERS OF DOG ANTI-SPE SERUM ?. K. Titers3 Animal Preadsorption Postadsorp TW325 512 3 YW323 2043 256 YW383 1024 32 RB4S0 4096 256 G433 512 16 a. Titers shown are the mean of at least four determinations of each sample and are recorded as the reciprocal of the highest twofold dilution giving a positive reaction. b. Serum samples were adsorbed by passage through a column of anti human IgE covalently bound to polyacrylamide beads. c. Any challenged site showing 5 mm or greater diameter blueing at 15 and 30 minutes post challenge was scored as positive.