Message:

<p>[QUOTE=&quot;Marie Forjan, post: 3797984, member: 147&quot;]I have a barometer from there late 1800s that has a tube with mercury that expands and contracts according to air pressure. The dial is connected to it to display the readings. The tube is not sealed, it’s open at the top.[/QUOTE]</p><p><br /></p>

Your name or email address:

Do you already have an account?

• No, create an account now.
• Yes, my password is:
• Forgot your password?

Stay logged in