A physico medical essay concerning alkaly and acid : so far as they have relation to the cause or cure of distempers : wherein is endeavoured to be proved that acids are not (as is generally and erroneously supposed) the cause of all or most distempers, but that alkalies are : together with an account of some distempers and the medicines with their preparations proper to be used in the cure of them : as also a short digression concerning specifick remedies /