An article which, though it does not contribute much that is new, constitutes a succinct, orderly and readable presentation of our knowledge on the subject, without adopting the standpoint of any particular school or advocating any strong individual views. The varieties of suggestibility are considered under the heads: (a) individual (suggestibility varies in different persons irrespective of the nature of the suggestion), (b) conditional (the variation of suggestibility in the same person at different times and under different conditions), (c) specific (variation in suggestibility according to the nature of the ideas touched upon), (d) personal (variation in suggestibility according to the attitude towards the person from whom the suggestion comes). The responses to suggestion are classified as: (a) positive, when the suggestion is accepted, (b) negative when it is opposed, (c) neutral, when it is refused. The author concludes with sections