first on one side and then on the other, which the head assumes in deliberation, e.g. when an artist is examining his work. He believes that from this gesture a symbol of deliberative assent would arise which might be confused with the rotation of the head on a vertical axis -- our sign of negation.] U [page] 290 throw the head backwards. 37 According to the Rajah Brooke, the Dyaks of Borneo express an affirmation by raising the eyebrows, and a negation by slightly contracting them, together with a peculiar look from the eyes. With the Arabs on the Nile, Professor and Mrs. Asa Gray concluded that nodding in affirmation was rare, whilst shaking the head in negation was never used, and was not even understood by them. With the Esquimaux 38 a nod means yes and a wink no . The New Zealanders elevate the head and chin in place of nodding acquiescence." 39 With the Hindoos Mr. H. Erskine concludes from inquiries made from experienced Europeans, and from native gentlemen, that the signs of affirmation and negation vary -- a nod and a lateral shake being sometimes used as we do; but a negative is more commonly expressed by the head being thrown suddenly backwards and a little to one side, with a cluck of the tongue. What the meaning may be of this cluck of the tongue, which has been observed with various people, I cannot imagine. A native gentleman stated that affirmation is frequently shown by