3M has reported fourth-quarter earnings of $1.81 per share, an increase of 11.7% versus the fourth quarter of 2013. Sales grew 2.0% year-on-year to $7.7 billion. Organic local-currency sales grew 6.3% with acquisitions adding 0.1% to sales. Foreign currency translation reduced sales by 4.4% year-on-year.   Operating income was $1.7 billion and operating income margins for the quarter were 21.5%. Fourth-quarter net income was $1.2 billion and the company converted 144% of net income to free cas...