Scientific toy in box: Demuth's Patent Pulsating Bottle Imp and Blood Tester
Glass, liquid, metal, cardboard
box: 1 5/8 x 6 3/4 x 1 3/4 in. ( 4.1 x 17.1 x 4.4 cm )
in relief: on Imp's metal belt: "DEMUTH PAT.JUN.1.7. . ." printed paper label: affixed to cardboard box: "DEMUTH'S / PATENT / Pulsating Bottle Imp / -AND- / BLOOD TESTER / The most amusing Scientific Toy / ever invented. / Directions for Use. / . . . / I
Colorless blown glass tube with bulb at one end; contains pink liquid in which a small brown (probably blown glass) doll (the "Imp") is suspended; when bulb is grasped, the heat of the hand makes liquid bubble; in original cardboard box with paper label.
Due to ongoing research, information about this object is subject to change.