The Dean of Admissions at Wesleyan (Mass.) lays it on the dotted line, with equal pertinence for the neophyte admissions officer choosing a freshman class as for the high school student choosing a college. Advice to the would-be matriculee leads off--know yourself, find your own philosophy of education (with the help of some sophisticated suggested reading); advice to the administrator concludes--a college is only as good as its diverse student body. How the former can become the latter is a quest--and questions are the best answer. Standards and techniques for evaluating the faculty, the milieu, the curriculum and the library are specific and searching; so are the criteria for judging high school records and standardized test scores, the suggestions for handling interviews and the required autobiography--and all are aimed at both sides of the desk. Summers count, so do extra-curricular activities (but there's no safety in numbers), and ""The Parent Is Not a Candidate;"" quotas are out, the unconventional candidate is in (sometimes), and rackets in counseling can be avoided by seeking out the legitimate nonprofit centers (names given). More than a guide, it's positive assistance to the young person in making a suitable and practical choice (and vice versa).