Is a “rare” stethoscope or hearing aid/conversation tube?
As I peruse ebay, I came upon the “stethoscope” advertised below. Flexible monaural stethoscopes were introduced around 1832. These were tubes of coiled spring covered with woven silk, usually 14 to 18 inches long, with a chest piece at one end and usually a very short, straight earpiece at the other. Flexible stethoscopes are often […]
Is a “rare” stethoscope or hearing aid/conversation tube? Read More »