"Spirit level" Quotes from Famous Books
 ... gun factories had sold to Roumania her cannon. On each gun was a delicate sight with a spirit level—a little glass tube supposed to be filled with a liquid which would not freeze. Slyly the Germans had filled these tubes with water, intending, in case Roumania entered the war on their side, to warn them about the "mistake." When the guns were hauled up into the mountains and freezing weather ...
— The World War and What was Behind It - The Story of the Map of Europe • Louis P. Benezet |
