Despite a long history of returning value to shareholders, these two industry giants have traded lower over the past year -- but it's an opportunity for investors.

"Do you know the only thing that gives me pleasure? It's to see my dividends coming in."

– John D. Rockefeller

Rockefeller was onto something there: Receiving quarterly dividend payments is one of the most satisfying things for anyone looking to reinvest for the power of compounding .

These two dividend stocks offer investors not only a long history of consistent dividends (and increases), they also both have strong economic moats to help ensure financial growth over the long haul. Here's why these two deserve income investors' consideration.

Getting back to its higher-margin roots

The Canadian National Railway ( C

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