The strychnine preparations are also valuable in the destruction of rats and mice. The first of these in point of usefulness is strychnine-wheat, or strychnine-oats Strychninweizen or Strychninhafer), in the proportion of 1 part of strychnine to 100 or 150 parts of wheat or oat flour, prepared by dissolving 1 part of strychnine in 40 to 50 parts of hot water, mixing well up with the flour, and drying in the water bath. Strychnine may also be used on fresh or salted meat, sausage, etc., by insertion of the powder, or the heads of fried fish are opened and the powder strewn on the inside. The latter is an especially deadly method, since the odor of the fish acts as a powerful lure, as also do the bits of bacon or other fats used in frying fish. Strong cheese is also a good vehicle for strychnine, acting as a powerful lure for the rodents.

Strychnine sulph..... 1 drachm

Sugar milk.......... 3 drachms

Prussian blue....... 5 grains

Sugar.............. 0.5 ounce

Oat flour........... 0.5 ounce

Nux Vomica Poison

Oatmeal............ 1 pound

Powdered nux vomica 1 ounce

Oil of anise......... 5 drops

Tincture of asafetida. 5 drops

Barium Poison

Barium carbonate... .   4 ounces

Sugar..............   6 ounces

Oatmeal............   6 ounces

Oil of anise.........   4 drops

Oil of caraway......   4 drops