ARSENICAL SOAP.
| Arsenic in powder | 3 | pounds |
| Salts of tartar | 1 | pound |
| Camphor gum | 6 | ounces |
| Cocoanut oil soap | 1½ | pounds |
| Powdered lime | 5 | ounces |
Cut the soap up fine and put it in a kettle containing one gallon of soft water and boil until the soap is well dissolved, then add the lime, salts of tartar and arsenic, stirring the mixture thoroughly; put the gum camphor in a half pint of alcohol and place in a mortar and crush it; take the kettle off the fire and add the camphor; mix well, and when partly cooled put it in fruit jars and seal up. It is now ready for use, and great care should be taken in using it, as it is a deadly poison.
PRESERVING POWDER.
| Arsenic in powder | 2 | pounds |
| Alum in powder | 1 | pound |
Mix thoroughly and keep in a dry place. This is also very poisonous.
CARBOLIC ACID.
The following solution of carbolic acid and water I have found very good in preserving skins, bugs, etc.:
| Carbolic acid | ½ | ounce |
| Soft water | 2 | quarts |
Turpentine is also a good preservative, and is sometimes used in place of corrosive sublimate.