Szekessy Vilmos (szerk.): A Magyar Természettudományi Múzeum évkönyve 59. (Budapest 1967)

Dezső, Gy.: The changes of some cephalic measurements of school children aged 7-17 years, in Budapest

of factors but rather of a more even increase. In other words, whereas the growth of the postcranial body parts has not only a velocity but also an acceleration, we cannot speak of this latter in the case of the head. It is rather interesting that another known phenomenon, namely a certain rhythm observed in the rate of increase, can also be discerned here. Lacking any parallel home data, we cannot compare ours with them. In his investigations in Ivád, NEMESKÉRI worked with summarized age groups (7—10 Table V Morphological facial heigt (n-gn) (boys) Age N M Increase -.2 s v V 7 51 94 65 17. 24 4. 15 86 _ 103 8 66 97 91 3 26 21. 46 4. 63 88 _ 110 9 47 100 26 2 35 22. 08 4. 69 92 110 10 52 102 28 2 02 18. 79 4. 37 92 _ 111 11 81 102. 68 0 40 28. 22 5. 01 92 113 12 63 105. 81 3 13 35. 55 5. 96 90 118 13 90 108. 55 2. 74 30. 60 5. 53 97 120 14 113 111. 65 3. 10 38. 22 6. 18 98 125 15 126 113. 19 1. 54 35. 47 5. 95 100 128 16 80 115 97 2. 78 29. 44 5. 42 102 126 17 52 116. 83 0. 86 43. 73 6. 61 104 130 (girls) Age N M Increase 9 S s V V 7 48 92. 84 18. 26 4. 27 85 103 8 60 94. 50 1. 66 24. 20 4. 91 85 104 9 64 95. 45 0. 95 22. 80 4. 77 85 108 10 65 97. 59 2. 14 27. 64 5. 25 89 109 11 63 98. 42 0. 83 28. 50 5. 33 90 113 12 69 101. 45 3. 03 18. 98 5. 38 90 115 13 64 104. 49 3. 04 31. 57 5, 61 95 118 14 27 105.11 0. 62 29. 65 5. 44 95 118 15 80 106. 23 1. 12 28. 51 5. 33 95 119 16 107 106. 81 0. 58 31. 00 5. 56 9.4 120 years, 11 — 12 years, etc.). No conspicuous results can be expected from a comparison with foreign data, owing to the insignificance of the order of magnitude of the obtainable results. With respect to the discussion in the introduction, no interracial comparison is possible. I attempted, however, a comparison (Table VIII) of the adult data of Hungarian ethnic groups with those of my oldest age group, since, in my opinion, the lower limit of age (18 years) used in ethnic investigations can be decreased to 16 years, with respect to the quicker and earlier evolvement of character owing to the effects of acceleration. Concerning the evaluation of the results of the investigations under discussion, our possibilities were rather limited. We had been able to complete, if even in a meagre amount, the missing basic data. We could measure the rate and order of temporal changes per age groups, sexes, and sexual differences. Differences had been