The term alterative is applied to medicines which, without any sensible operation, or with a laxative or diuretic operation so gradual as not to interfere with the usual work or diet, produce a favorable change in the system, and, in common language, " purify the blood." Alterative balls are given in skin diseases, swelled legs, grease, foul humours, etc.; usually 1 daily or every other day.

Diuretic Alterative Balls. 1. Dried common soda 1 oz., Castile soap 6 dr., resin 2 oz., liquorice powder 1/2 oz., Bar-badoes tar to form 6 balls; 1 daily. - White.

2. Acetate of potash 1/2 oz., resin 1/2 oz., fenugreek 1 oz., treacle enough to form a mass for 2 balls; 1 daily.

Laxative Alterative Balls. 1. Aloes 4 oz., soft soap 4 oz., common mass 24 oz.; mix; dose, 1 oz. - V. C.

2. Socotrine aloes 8 oz., soft soap 8 oz., common mass 16 oz.; mix; dose, 1 oz. - V. C.

3. Aloes 10 dr., soap 12 dr., caraways 12 dr., ginger 4 dr., treacle q. s. for 4 balls; 1 daily. - White.

4. Aloes 1 dr., diuretic mass (see balls, No. 1 or 3) 9 dr.

9. Antimonial powder 1 dr., aloes 1 or 2 dr., diuretic mass (see balls, No. 1 or 3) 1 oz. Antimonial or Diaphoretic Alterative Balls. 1. Levigated antimony 2 or 4 dr., caraway seeds 4 dr., treacle q. s. to form a ball. - White.

2. Prepared antimony 2 dr., nitre 3 dr., sulphur 2 dr., linseed meal 2 dr., palm oil to form a mass; one every night, in megrims. - Clater.

3. Tartarized antimony 2 dr., elecampane 2 oz., guaia-cum 6 dr., sulphur 1 oz., treacle and flour to form 6 balls; one daily.

4. Tartarized antimony 3 dr., ginger a scruple, soap 1 oz. For 3 balls; one every other morning. - Vines.

5. Emetic tartar, 5 oz., ginger 3 oz., opium 1 oz., and syrup to make 16 balls.