Section 155. Notice to be posted

No person shall engage in the sale of
  adulterated turpentine, adulterated linseed oil  or  adulterated  boiled
  linseed  oil,  in  original  packages  or  other than original packages,
  unless there are posted conspicuously in the room where such  goods  are
  sold,  signs  bearing  the words "Adulterated Turpentine sold here, " or
  "Adulterated Linseed Oil sold here, " as the case  may  be,  in  legible
  letters  in  the  English language at least two inches in length and one
  inch in width, said letters to be in black on a white background.