No. 1. The sulphuric and nitrous acids, which must be used
cautiously: they may be diluted with a sufficiency
of water, to be applicable to the purpose required.
2. Nitrous acid 1 oz.
Quicksilver ½ oz.
Place them in a large gallipot, or open phial, and avoid the noxious
fumes which arise. When the quicksilver is perfectly dissolved, and the
mixture cold, it may be put into a phial and corked.
This is a strong and efficacious caustic; a certain remedy for the
foot-rot in sheep, and effectual in canker of the horse’s foot, provided
these complaints are properly managed in other respects. It is formed
with melted hog’s lard into a strong _detergent_ ointment, or diluted
with water.
No. 3. Nitrous acid 1 oz.
Verdigris ½ oz.—Mix.
This caustic is similar to the former, and applicable to the same
purposes.
No. 4. Muriate of antimony, or butter of antimony.
5. Muriate of quicksilver, or sublimate 1 dr.
Muriatic acid 2 dr.
This is a very powerful caustic, and always requires dilution. Yellow
arsenic mixed with lime and grease, or hog’s lard, is sometimes used as
a caustic to destroy warts, or cure fistula or poll-evil.