Soldium flouride was first adopted in America, then making an improvement in Japan and Taiwan with the Anti-Pigworm powder as its excellent result. By the preceding test, it not only has an extraordinary effects but also convenient and economic. (1) Dose For pigs, conceived or suckled, it is 0.05 gm. pf soldiut flouride per kg. of its own weight, or one tablet of anti-pigworm-powder per 3 kgs. of its own weight in equivalence. As for young pigs, it is 0.0975-gm. per or one tablet per 1.54 kgs. (2) Administration Take a little thicker portion from the soluble feed, mixing with a certain dose as stated above. for feed, then furnish the remainder. After four times successive administrations, it gains a hundred percent effect in expelling the worms. (3) Reaction No evidence of reactions except a slight diarrhea which does not effect the health condition and causes no damage. This slight diarrhea is more beneficial to the expelling of wormeggs. (4) Summary (a) Highly careful should be required for f he administration to the conceived r suckled pigs, and their infants can no longer be injected. (b) Pigs should be fed as usual before administration and requires no purgative after administration. (c) it is more convenient and economic in comparison with santonin.