Quote by H. L. Mencken

All [zoos] actually offer to the public in return for the taxes spent upon them is a form of idle and witless amusement, compared to which a visit to a penitentiary, or even to a State legislature in session, is informing, stimulating and ennobling.

Please suggest source details if you know: book, page, year, online article address (url), correction (different author...), etc.. Thanks.