Anerood mail

I think you meant to type "aneroid mail"!

Aneroid mail, also known as "aneroid post" or "aneroid mail art," is a type of mail art that uses aneroid barometers, which are instruments that measure atmospheric pressure, as the primary medium. The aneroid barometer is often used to create unique and intricate designs, patterns, and messages on the surface of the mail piece.

Aneroid mail is a form of mail art that combines the traditional art of mail art with the scientific concept of atmospheric pressure. It requires a high level of creativity, patience, and attention to detail, as the artist must carefully manipulate the aneroid barometer to create the desired design or message.

Aneroid mail is often used to create unique and personalized mail pieces, such as postcards, letters, and envelopes. It is also used to create art pieces that are meant to be displayed or exhibited, rather than sent through the mail.

Overall, aneroid mail is a fascinating and unique form of mail art that combines science, art, and creativity in a way that is both beautiful and thought-provoking.