Lightboxes
Cart
alb3329500

Boudet's microphone.

Boudet's microphone: this consisted of a glass tube 3ins long and 0.4 ins in diameter. Copper cylinder, M was connected to membrane of rubber (D) at one end and to six carbon balls at the other. Screw at V was used to adjust pressure of contact between balls. Dated 1882.
Share
pinterestPinterest
twitterTwitter
facebookFacebook
emailEmail

Add to another lightbox

Add to another lightbox
add to lightbox print share
Do you already have an account? Sign in
You do not have an account? Register
Buy this image
Loading...
Title:
Boudet's microphone.
Caption:
Boudet's microphone: this consisted of a glass tube 3ins long and 0.4 ins in diameter. Copper cylinder, M was connected to membrane of rubber (D) at one end and to six carbon balls at the other. Screw at V was used to adjust pressure of contact between balls. Dated 1882.
Credit:
Album / Universal Images Group / Universal History Archive
Releases:
Model: No - Property: No
Rights questions?
Image size:
4220 x 4969 px | 60.0 MB
Print size:
35.7 x 42.1 cm | 14.1 x 16.6 in (300 dpi)
Keywords: