A treasure of useful discoveries. [electronic resource] : Containing, remarks on divers aliments or eatables, whereby to know which are not digested by our Stomachs; and those unfit for our Bodies are pointed out: Also, an Account of the Nutriment or Chyle divers Foods give into the Blood; proper to be known by Persons apt to be too corpulent or too thin, in order to prevent Pain and Diseases, and, in a great Measure, sudden Deaths: With a Number of valuable Discoveries, particularly, A Method of destroying Bugs in Houses; and to prevent the ill Practice of opening Letters, or any sealed Things. By B. Godfrey, M.D.