This is a very simple recipe of Peterburgian snuff, which was made in Poland (Union factory, Warsaw) in the second half of the 19th century. It was the most popular snuff among those produced by Union.
"Add 15% of wood ash, 10% of potash, 7% of salt, 2% of fragrant meleot herb to the dust of the very best mahorka; after mixing and sieving it properly, add drops of fragrant bergamot oil, then package it up".
Meleot - Melilotus officinalis (yellow sweet clover), mahorka - Nicotiana rustica.
Though most old Russian varieties of rustica didn't bear mindblowing amounts of nicotine, it was (and still is) considerably stronger than regular tobacco (Nicotiana tabacum).
Strangely, water is not mentioned in this recipe. If anyone would like to recreate this snuff, I recommend using water instead of ash, which contains mostly potash after all, whereas the originally indicated amount of potash (10%) alone is more than sufficient for freebasing the nicotine. Potash can be substituted with 8 % of sodium carbonate (anhydrous) for the same effect. Sweet clover contains coumarin, so it can be substituted with tonka beans, adding them to taste into the finished snuff.
A very interesting article about snuff taking in Russia there with a reference to another, more sophisticated old recipe of stove-fermented Rose snuff, which I will hopefully translate and post in this thread someday.
P. S. 10% of potash or sodium carbonate with 15-20% moisture makes a strong snuff even with ordinary tobacco. Expect ammonia party! :)