
• (n.) 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. • (n.) An instrument consisting essentially of a glass tube provided with a graduated scale, for exhibiting to the eye the changes of ...
Found on 
http://thinkexist.com/dictionary/meaning/volumescope/
Vo·lu'me·scope  noun [ 
 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. 
Found on 
http://www.encyclo.co.uk/webster/V/35
  No exact match found.