and metallic substances, to cure all the diseases there are in it ; furthermore do we opine, that every region of the globe, climate, district, yields the remedies which are to be made use of in that region, climate, district, and that remedies brought from any other region than that where the diseases in which they are to he used happen, do more hurt than good ; still further do we opine, that we are the only real doctors, that we are the ready-made ones, that we can cure all sorts of diseases,