The practical proofs of the soundness of the Hygeian system of physiology : selected from the appendix of “Morisoniana”, as incontrovertible testimonies to the afflicted, of the inestimable value of Morison’s vegetable universal medicine : including, with other important matter, “The origin of life, and cause of all disease explained”, and an entirely new view of the origin of the small pox virus, and of its being most certainly eradicable, or rendered harmless