CAUSTICS, OR CAUTERIES — CHARGES. 455 



45 Fused Potass, difficult to manapje, because it runs about in all 

 directions, and little used in veterinary medicine. 



46. Lunar Caustic, or Nitrate of Silver, very valuable to the veterinary 



surgeon, and constantly used to apply to profuse granulations. 



47. Sulphate of Copper, almost equally useful, but not so strong as 



Lunar Caustic. It may be well rubbed into all high granulations, 

 as in broken knees, and similar growths. 



48. Corrosive Sublimate in powder, which acts most energetically 



upon warty growths, but should be used with great care and dis- 

 cretion, it may safely be applied to small surfaces, but not with- 

 out a regular practitioner to large ones. It should be washed off 



after remaining on a few minutes. For the mode of applying it in 

 castration, see page 442. 



49. Yellow Orpiment is not so strong as Corrosive Sublimate, and may 



be used with more freedom. It will generally remove warty 

 growths, by picking off their heads and rubbing it in. 



50. Muriate of Antimony, called Butter of Antimony ; a strong but 



rather unmanageable caustic, and used either by itself or mixed 

 with more or less water. 



51. Chloride of Zinc is a most powerful caustic. * It may be used in 



old sinuses in solution — 7 drachms in a pint of water. 



Milder Caustics : — 



52. Verdigris, either in powder or mixed with Lard as an ointment, in 



the proportion of 1 to 3. 



53. Red Precipitate, ditto, ditto. 



54. Burnt Alum, used dry. 



55. Powdered White Sugar. 



Mild Liquid Caustics : — 



56. Solution of Nitrate of Silver, 5 to 15 grains to the ounce of dis- 



tilled water. 



57. Solution of Blue Vitriol, of about double the above strength. 



58. Chloride of Zinc, 1 to 3 grains to the ounce of water. 



CHAEGES 



Are ADHESIVE PLASTERS which are spread while hot on the legs, 

 and at once covered with short tow, so as to form a strong and un- 

 yielding support while the horse is at grass. 



59. Obdinaby Charges— 



Burgundy Pitch .... 4 ounces. 



Barbadoes Tar 6 ounces. 



Beeswax 2 ounces. 



Red Lead 4 ounces. 



The three first are to be melted together, and afterwards the Lead is to 

 be added. The mixture is to be kept constantly stirred until sufficiently 

 cold to be applied. If too .stiff (which will depend upon the weather), it 

 may be softened by the addition of a little Lard or Oil. 



