1920s: A pointer is used to show the parts of the head which affect the human voice box in the 1920s.

Name: 1920s Pointer Used Show Parts Head
Uploaded: 2017-05-11T00:00:00.000Z
Duration: 45 s
Channel: Rick Ray
Description: 1920s: A pointer is used to show the parts of the head which affect the human voice box in the 1920s. Stock Footage Video (100% Royalty-free) 26693845 | Shutterstock