=Voidable Marriages.=--If a man and woman go through the marriage ceremony, such a contract is null and void under the following circumstances: (1) Where bigamy has been committed; (2) if one of the parties were insane at the time of marriage; (3) where the plaintiff is under sixteen years of age; (4) when the marriage has not been consummated or followed by cohabitation; (5) when one of the parties was incapable of performing the marital act (impotent, and such not known by the other at the time); (6) when drunkenness had been induced so as to obtain consent; (7) concealment of pregnancy at the time of marriage. XXXIX.--FEIGNED DISEASES Malingering in its various forms is by no means uncommon, and by many is regarded as a disease in itself. It is necessary, however, to distinguish between those cases in which it is feigned for some definite purpose--for example, to escape punishment or avoid public service--and those in which there is adequate motive, and the patient shams simply with the view of exciting sympathy, or from the mere delight of giving trouble. It is not uncommon for individuals summoned on a jury, or to give evidence in the law courts, to apply to their doctor for a certificate, assigning as a cause of exemption neuralgia, or some similar complaint unattended with objective symptoms. In such cases it is well to remind the patient that in most courts such certificates are received with suspicion, and are often rejected, and that the personal attendance of the medical man is required to endorse his certificate on oath. Malingering has become much more common since the National Health Insurance Act has been passed. The possibility of obtaining a fair sum each week without the necessity of working for it induces many persons either to feign disease or to make recovery from actual disease or accident much more tedious than it ought really to be. The feasibility of successfully malingering is greatly enhanced by the possession of some chronic organic disease. An old mitral regurgitant murmur is useful for this purpose. It is not flattering to one's vanity to overlook a case of malingering, but should this occur little harm is done. It is a much more serious matter to accuse a person of malingering when in reality he may be suffering from an organic disease. Here are some of the diseases which are most frequently feigned: =Nervous Diseases=, as headache, vertigo, paralysis of limbs, vomiting, sciatica, or incontinence or suppression of urine, spitting of blood; others, again, simulate hysteria, epilepsy, or insanity. On the other hand, the malingerer may actually produce injuries on his person either to excite commiseration or to escape from work. Thus, the beggar produces ulcers on his legs by binding a penny-piece tightly on for some days; the hospital patient, in order to escape discharge, produces factitious skin diseases by the application of irritants or caustics.