The document discusses three lessons that can be learned from Schlumberger's balance sheet about the company's size, liquidity, and solvency. It notes that Schlumberger is one of the largest companies in America based on metrics like total assets and revenue. It finds that Schlumberger's current ratio indicates liquidity within the normal range for large companies. And it determines that Schlumberger's debt-to-equity ratio shows it is solvent with debt lower than equity.