At last I have a couple of tonka beans. I’ve snapped up a hint from Xander and removed the skin, after soaking for a few hours. I must say that one bean has a remarkable effect on about 50 grams of rather plain snuff. It’s effect in a small box is very noticable, though I am not sure I like it at these ‘vanilla-like’ levels.
All in all, an excellent enhancer of snuff, particularly, in my view , of the finer sort. As Snuffster has remarked G Smiths’ snuffs used at one time to ring some remakable changes on tonquin effects (when they were made by SG, some years ago, presumably).
As I read it tonquin has fallen into some disrepute as a result of the rather heavy use of coumarin, which it contains, in cigarettes (obtained usually from other plant sources for this purpose). I think it has been suggested that coumarin makes the tobacco more addictive, or at least habit forming. I believe it has also been considered carcinogenic in the lungs in this form, though I have not read the case for this. It has another property: thinning the blood. Though from what I have read one would have to injest quite large quantities daily to produce this effect.
Used sparingly (though others might prefer its stronger flavour), it’s a wonderful adulterant, and has a long history in the snuff box. Any tips, or takes, or anecdotes about tonka/tonquin would be welcomed.