. Carnegie Institution of Washington publication. FIELDS, GRAPHS, AND OTHER DATA ON FETAL GROWTH. 65 In figure 5 the number of deliveries per day are plotted, beginning with 260 days. The numbers above indicate the total number of cases for each day. Here, too, the large number of cases with a long duration is evident. Figure 4 gives the curves of growth of weight of Hennig and myself. The former is based on 100 cases, the latter on 229. Neither is carried beyond 2,500 grams, because that is where Hennig's curve stops. The peculiar disagreement between these curves between a weight of 1,250 an
. Carnegie Institution of Washington publication. FIELDS, GRAPHS, AND OTHER DATA ON FETAL GROWTH. 65 In figure 5 the number of deliveries per day are plotted, beginning with 260 days. The numbers above indicate the total number of cases for each day. Here, too, the large number of cases with a long duration is evident. Figure 4 gives the curves of growth of weight of Hennig and myself. The former is based on 100 cases, the latter on 229. Neither is carried beyond 2,500 grams, because that is where Hennig's curve stops. The peculiar disagreement between these curves between a weight of 1,250 and 1,750 grams is puzzling. However, I am inclined to regard Hennig's curve as probably the more defective, for it is based on a comparatively much smaller number of cases and also because we know that a rapid increase in weight occurs between a weight of 1,300 and 2,300 grams. Nevertheless, the sharp increase and decline in my curve are probably also incorrect and due to a too narrow statistical basis. Figure 6 represents various curves of length. Those of Toldt and Mall are drawn after Mall (1910), page 200. Here the close correspondence between the character and location of the curve of Hennig, that of Shroeder-Ahlfeld as given by Stratz (1909), which 22 20 24 35 50. Duration in days Number of deliveries daily between 260 and 340 days. The figures above represent the exact number of deliveries indicated on that point on the graph. 1,949 cases. coincides with that of Stratz (1910), and my curve is evident. The fact that my graph lies to the left of all the others, including that of Hecker and Michaelis,is difficult to explain, except upon the assumption that the other curves were based on averages, while my curve is a median. Not that I assume a definite mathematical relationship between the average and median values; for as far as I can see it is impossible to decide in advance what their relation in a given case is. An inspection of the fields might help to suggest where bot
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