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ighth month of pregnancy。 She gave birth to a child； which； though not fully matured； lived。 There was no milk…secretion in her breasts； and she could distinctly feel the movements of another child； her abdomen increased in size。 After two months she had another labor； and a fully developed and strong child was born； much heavier than the first。 On the third day after； the breasts became enlarged； and she experienced considerable fever。 It was noticeable in this case that a placenta was discharged a quarter of an hour after the first birth。 Irvine relates an instance of thirty…two days' delay； and Pfau one of seven days'。
Carson cites the instance of a noblewoman of forty； the mother of four children； who was taken ill about two weeks before confinement was expected； and was easily delivered of a male child； which seemed well formed； with perfect nails； but weakly。 After the birth the mother never became healthy or natural in appearance。 She was supposed to be dying of dropsy； but after forty…four days the mystery was cleared by the birth of a fine； well…grown； and healthy daughter。 Both mother and child did well。
Addison describes the case of a woman who was delivered of a healthy male child； and everything was well until the evening of the fourth day； when intense labor…pains set in； and well…formed twins about the size of a pigeon's egg were born。 In this strange case； possibly an example of superfetation； the patient made a good recovery and the first child lived。 A similar case is reported by Lumby in which a woman was delivered on January 18th； by a midwife； of a full…grown and healthy female child。 On the third day she came down…stairs and resumed her ordinary duties； which she continued until February 4th （seventeen days after）。 At this time she was delivered of twins； a boy and a girl； healthy and well…developed。 The placenta was of the consistency of jelly and had to be scooped away with the hand。 The mother and children did well。 This woman was the mother of ten children besides the product of this conception； and at the latter occurrence had entire absence of pains and a very easy parturition。
Pincott had a case with an interval of seven weeks between the births； Vale 1 of two months； Bush 1 of seventeen days； and Burke 1 with an interval of two months。 Douglas cites an instance of twins being born four days apart。 Bessems of Antwerp； in 1866； mentions a woman with a bicornate uterus who bore two twins at fifty…four days' interval。
CHAPTER IV。
PROLIFICITY。
General Historic Observations。Prolificity is a much discussed subject； for besides its medical and general interest it is of importance in social as well as in political economy。 Superfluous population was a question that came to consciousness early； Aristotle spoke of legislation to prevent the increase of population and the physical and mental deterioration of the race；he believed in a population fixed as regards numbers；and later Lycurgus transformed these precepts into a terrible law。 Strabonius reports that the inhabitants of Cathea brought their infants at the age of two months before a magistrate for inspection。 The strong and promising were preserved and the weak destroyed。 The founders of the Roman Empire followed a similar usage。 With great indignation Seneca； Ovid； and Juvenal reproved this barbarity of the Romans。 With the domination of Christianity this custom gradually diminished； and Constantine stopped it altogether； ordering succor to the people too poor to rear their own children。 The old Celts were so jealous of their vigor that they placed their babes on a shield in the river； and regarded those that the waves respected as legitimate and worthy to become members of their clans。 In many of the Oriental countries； where the population is often very excessive and poverty great； the girl babies of the lower classes were destroyed。 At one time the crocodiles； held sacred in the Nile； were given the surplus infants。 By destroying the females the breeding necessarily diminished； and the number of the weaker and dependent classes became less。 In other countries persons having children beyond their ability to support were privileged to sell them to citizens； who contracted to raise them on condition that they became their slaves。
General Law； and the Influence of War。In the increase of the world's population； although circumstances may for the time alter it； a general average of prolificity has； in the long run； been maintained。 In the history of every nation artificial circumstances； such as fashion； war； poverty； etc。； at some period have temporarily lowered the average of prolificity； but a further search finds another period； under opposite circumstances； which will more than compensate for it。 The effect of a long…continued war or wars on generation and prolificity has never been given proper consideration。 In such times marriages become much less frequent； the husbands are separated from their wives for long periods； many women are left widows； the females become in excess of the males； the excitement of the times overtops the desire for sexual intercourse； or； if there is the same desire； the unprolific prostitute furnishes the satisfaction； and such facts as these； coupled with many similar ones； soon produce an astonishing effect upon the comparative birth…rate and death…rate of the country。 The resources of a country； so far as concerns population； become less as the period of peace…disturbance is prolonged。 Mayo…Smith quotes von Mayr in the following example of the influence of the war of 1870…71 on the birth…rate in Bavaria；the figures for births are thrown back nine months； so as to show the time of conception： Before the war under normal conception the number of births was about 16；000 per month。 During the war it sank to about 2000 per month。 Immediately on the cessation of hostilities it arose to its former number； while the actual return of the troops brought an increase of 2000 per month。 The maximum was reached in March； 1872； when it was 18；450。 The war of 1866 seems to have passed over Germany without any great influence； the birth…rate in 1865 being 39。2； in 1866； 39。4； in 1867； 38。3； in 1868； 38。4。 On the other hand； while the birth…rate in 1870 was 40。1； in 1871 it was only 35。9； in 1872 it recovered to 41。1； and remained above 41 down to 1878。 Von Mayr believes the war had a depressing influence upon the rate apart from the mere absence of the men； as shown in the fact that immediately upon the cessation of hostilities it recovered in Bavaria； although it was several months before the return of the troops。
Mayo…Smith； in remarking on the influence of war on the marriage…rate； says that in 1866 the Prussian rate fell from 18。2 to 15。6； while the Austrian rate fell from 15。5 to 13。0。 In the war of 1870…71 the Prussian rate fell from 17。9 in 1869 to 14。9 in 1870 and 15。9 in 1871； but in the two years after peace was made it rose to 20。6 and 20。2； the highest rates ever recorded。 In France the rate fell from 16。5 to 12。1 and 14。4； and then rose to 19。5 and 17。7； the highest rates ever recorded in France。
Influence of Rural and Urban Life。Rural districts are always very prolific； and when we hear the wails