Note g — BOOK V.
Reading edition
Nor are Diseases themselves useless: For the Blood in a Fever, if well govern’d, like Wine upon the Fret, dischargeth it self of all heterogeneous Mixtures; and Nature, the Disease, and Remedies, clean all the Rooms of the House; whereby that which threatens Death, tends, in Conclusion, to the prolonging of Life. Grew ubi supr. §. 52.
And as Diseases minister sometimes to Health; so to other good Uses in the Body, such as quickning the Senses: Of which take these Instances relating to the Hearing and Sight.
A very ingenious Physician falling into an odd Kind of Fever, had his Sense of Hearing thereby made so very nice and tender, that he very plainly heard soft Whispers, that were made at a considerable Distance off, and which were not in the least perceiv’d by the Bystanders, nor would have been by him before his Sickness.
A Gentleman of eminent Parts and Note, during a Distemper he had in his Eyes, had his Organs of Sight brought to be so tender, that both his Friends, and himself have assur’d me, that when he wak’d in the Night, he could for a while plainly see and distinguish Colours, as well as other Objects, discernible by the Eye, as was more than once try’d. Boyl. deter. nat. of Effluv. ch. 4.
Daniel Fraser——continu’d Deaf and Dumb from his Birth, till the 17ᵗʰ Year of his Age——After his Recovery from a Fever, he perceiv’d a Motion in his Brain, which was very uneasy to him; and afterwards he began to hear, and in Process of Time, to understand Speech, &c. Vid. Philos. Trans. Nᵒ. 312.