This is clipart converted and broken apart that has been released into the public domain because the document says so, and its from NASA, a USA government agency. The publication is called "The Brain in Space:"
http://www.nasa.gov/audience/foreducators/topnav/materials/listbytype/The.Brain.in.Space.html
Round bottemed flask with bung and tube. black and white diagram / outline.
Also with ink drop to show thermal expansion
From GENERAL SCIENCE BY
BERTHA M. CLARK, PH.D.
(Gutenberg EBook 16593)