The animal should be prepared by bran mashes for two days, and the ball given fasting in the morning. Gentle exercise with a ball is useful, but not after it begins to operate. Genuine Barbadoes aloes alone should be used (from the gourd, not melted), and the dose seldom need exceed 6 dr. A week should be allowed after the operation of one ball before another is given. See Aloes, in the Veterinary Materia Medica.

1. (V. C. Cathartic Mass.) Bruised B. aloes 8 oz., olive oil 1 oz.; melt together in a vessel placed in hot water; remove it from the fire, add 3 oz. of treacle, and stir all together; dose, 6 to 12 dr., equal to 4 to 8 dr. of aloes.

2. (V. C. Stronger.) To each dose of the last add from 4 to 8 drops of croton oil.

3. Aloes Barhadoes in small pieces 8 parts, glycerin 2 parts, ginger in powder 1 part. Melt together in a water-hath, and thoroughly incorporate by constant stirring. If desirable, gentian may be substituted for ginger. Dose, from 6 to 8 dr. - Tuson.

4. B. aloes 4 to 8 dr., soap 3 to 4 dr., ginger 1 dr., oil of cloves 10 drops (or oil of caraway or aniseed 20 drops), water 1 dr. or q. s.; beat together into a mass. - White. Mr. W. says it is the best that can be employed.

5. B. aloes 15 oz., ginger 1 oz.; mix and beat up with 8 oz. of palm oil. Dose, 1 oz. to 1 1/2. - Youatt.

6. B. aloes 24 dr., Cape aloes 12 dr., olive oil 4 dr.; treacle 12 dr.; dose, 7 to 14 dr.; mix as No. 1. - Morton.

7. B. aloes 5 dr., 7 1/2 dr. or 9 dr., oil of caraway 10 drops; made up with palm oil or lard. - Mr. Blaine's Nos. 1, 2, and 3.

8. Melt B. aloes (in a tin vessel immersed in boiling water) with a fifth of its weight of treacle, and, while soft, pour it into paper moulds; 1 oz. is a full dose for a large-sized saddle or coach horse. - B. Clark. [For a convenient apparatus for melting and casting these balls, see Mr. Bracy Clark's Pharmacopoeia Equina; or Vol. V of the Pharmaceutical Journal.]

9. B. aloes 5 to 8 dr., cream of tartar 2 dr., oil of cloves 10 drops, treacle to form a ball. - Peall.

10. Aloes 7 dr., Castile soap 4 dr., aromatic powder 1 dr., oil of caraway 6 drops; mucilage to form a ball. - Hinds.

11. B. aloes 7 1/2 parts, Socotrine aloes 7 1/2 parts, ginger 1 part; mix the powders, add 7 1/2 parts of palm oil, and beat to a mass; keep it in a jar closely covered; dose, 1 1/4 oz. to 1 3/4 oz. - Clater.

12. B. aloes 13 1/2 oz., lard 6 oz., treacle 1 1/2 oz., water 1 1/2 oz.; put them in an earthen vessel, placed in boiling water; mix, and form the mass into 18 balls. - McEwen.

13. Aloes and hard soap each 5 oz., pearl ashes 1 oz., powdered ginger 1 oz. Melt in a ladle and divide, while warm, into 8 balls.

Mercurial Physic Balls. 1. Cathartic mass (No. 10 above) 10 to 14 dr., calomel 1 dr. to 1 1/2 dr.; mix. - Clater.

2. For stomach staggers: aloes 1 oz., calomel 1/2 dr., cascarilla 3 dr., syrup to form a ball. - White.