Volumescope

Vo*lu"me*scope (?), n. [Volume + -scope.] (Physics) An instrument consisting essentially of a glass tube provided with a graduated scale, for exhibiting to the eye the changes of volume of a gas or gaseous mixture resulting from chemical action, etc.

Vo*lu"me*scope (?), n. [Volume + - scope.] (Physics) An instrument consisting essentially of a glass tube provided with a graduated scale, for exhibiting to the eye the changes of volume of a gas or gaseous mixture resulting from chemical action, and the like.