32. The eyes often betray much. If, in addition to want of luster and natural brilliancy, they are sunken, present red edges, are somewhat sore, perhaps, and are surrounded by a dark ring, the patient, especially if a child, should be suspected and carefully watched. It should be observed, however, that dyspepsia, debility from any cause, and especially loss of sleep, will produce some or all of these signs, and no one should be accused of the vice upon the evidence of these indications alone, neither could he be justly suspected so long as his symptoms could be accounted for by legitimate causes. 33. An habitually moist, cold hand, is a suspicious circumstance in a young person who is not known to be suffering from some constitutional disease. 34. _Palpitation of the heart_, frequently occurring, denotes a condition of nervous disturbance which has some powerful cause, and which may often be found to be the vice in question. 35. _Hysteria_ in females may be regarded as a suspicious circumstance when frequently occurring on very slight occasions, and especially if there is no hereditary tendency to the disease. 36. _Chlorosis_, or _green sickness_, is very often caused by the unholy practice under consideration. It is very commonly attributed, when occurring in young women, to menstrual derangements; but it is only necessary to remember that these menstrual irregularities are in many cases the result of the same habit, as has been already pointed out. 37. _Epileptic fits_ in children are not infrequently the result of vicious habits. 38. _Wetting the bed_ is an evidence of irritation which may be connected with the practice; it should be looked after. 39. _Unchastity of speech_ and fondness for obscene stories betray a condition of mind which does not exist in youth who are not addicted to this vice. As previously remarked, no single one of the above signs should be considered as conclusive evidence of the habit in any individual; but any one of them may, and should, arouse suspicion and watchfulness. If the habit really exists, but a short time will elapse before other signs will be noticed, and when several point in the same direction, the evidence may be considered nearly, if not quite, conclusive. But persistent watching will enable the positive signs to be detected sooner or later, and then there can no longer be doubt. It is, of course, necessary to give the individual no suspicion that he is being watched, as that would put him so effectually on his guard as, possibly, to defy detection.