Book excerpt: The uses of the instruments, the vertues and operations of the medicines, the cures of the most frequent diseases at sea: namely, wounds, apoftumes, vlcersm fiftulaes, fractures, dislocations, whis the true maner of ampputation, the cure of the scuruie, the fluxes of the belly, of the collica and illiaca passio, tenasmus, and exitus ani, the callenture; With a briefe explanation of sal, sulphur, and mercury; with certaine characters, and tearmes of arte