Experiments and observations on quilled and red Peruvian bark : among which are included, some remarkable effects arising from the action of common bark and magnesia upon each other : with remarks on the nature and mode of treatment of fevers, putrid sore-throat, rheumatism, scrophula, and other diseases; in order to ascertain the cases in which bark may be administered-either alone, or combined with other remedies-to the best advantage : to which is added, an appendix, on the cinchona caribbaea