The Mechanics and Rhetoric of Conversation : Page 36

After you have made up your mind and know what is correct or preferable in matters of pronunciation, and have become properly conscious of pronunciation, you must again and again caution yourself against making others self-conscious about their pronunciation when in your presence. When others pronounce wrongfully or doubtfully, you will not advert to it pointedly. You will not interrupt the conversation, or cause embarrassment to a speaker by bringing up a point of pronunciation. You should, however, charitably and tactfully, especially if the mispronunciation is so flagrant as to lead to embarrassment sooner or later, find a way to tip the speaker off to the proper pronunciation. If someone said, "Wor-ces-ter seems to be an old town," you might after a few sentences say, "The cester in that old town the natives refer to as Wooster comes from the old Roman word castra, meaning 'fort.' "In this way you will avoid the deserved rebuke a lady tourist administered to a Californian. Pronouncing the J as in Joseph, she had spoken of visiting San Jose. He corrected, saying, "Madam, it's San Hose*. In California we pronounce the j as h." After he had given her time to recover from this correction, he asked when she visited California. She replied pointedly, "Why, I was out there in Hune and Huly."