R for Ring alphabet Learning For Kids Join Facebook Page Art & Photography By Pranav Waghmare http://www.facebook.com/pages/Art-Photography-By-Pranav-Waghmare/139068996153870
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)