Question: What is the name of the magazine that Funk & Wagnalls published thateventually merged with two similar weekly magazines, "Public Opinion" and "Current Opinion"? 
Sentence (from "Isaac K. Funk"): Isaac Kaufmann Funk (September 10, 1839April 4, 1912) was an American Lutheran minister, editor, lexicographer, publisher, and spelling reformer.
Relevant evidence: No