[He lists off a number of them, including the quantity he uses.]
...I can, of course, provide a small sample of an extraction. Put only a small drop of it on the back of her hand and if the surrounding skin reddens and itches, then you will know that she is allergic to it.
no subject
...I can, of course, provide a small sample of an extraction. Put only a small drop of it on the back of her hand and if the surrounding skin reddens and itches, then you will know that she is allergic to it.