File:Annals of hygiene (1896) (14763585891).jpg

Identifier: annalsofhygiene1118penn (find matches)
Title: Annals of hygiene
Year: 1896 (1890s)
Authors: Pennsylvania. State Board of Health
Subjects: Hygiene Public Health
Publisher: Philadelphia : University of Pennsylvania Press (etc.)
Contributing Library: The College of Physicians of Philadelphia Historical Medical Library
Digitizing Sponsor: The College of Physicians of Philadelphia and the National Endowment for the Humanities

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se puts him still farther from those proportions which hewill finally have as a man. In order to study the growth of these parts more closely, letus examine Chart II. Here those measurements which are dis-tinctly bone lengths, bone girths, and muscle girths have beenselected, and the measurements of the typical boy of each year ofage from 11 to 15 have been plotted. To avoid the confusion oftoo many intersecting lines, numbers have been placed in theirstead, the number i representing the age 11, 2 representing 12,and so on to 15. Now it is plain that, if, for any two successive years of age,the numbers fall at the same point for any part of the body, thatpart has for the intervening year a rate ,of growth in proper pro-portion to the growth for the same year in total height. Also, anadvance towards the right indicates a relatively acceleratedgrowth in any part, and a retrogression towards the left shows arelatively retarded growth. The Annals of Hygiene—737 CHART I AGE 11 AGE 15 —
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738—The Annals of Hygiene CHART II Sitting B O NT E LENGTH S Per Cent Knee Pubis Sh-Elbow Elb Tip 5 1 0 20 30 H \0 50 60 70 8 (0 90 95 ti 2 1 5 1 2 Its 1 Z 3 5 1 2 3 512 it 5 BONE G I R T H 5 32 1 Knee t S 3 Z I Ankle 5 3 21 Instep 3 i 2 I Elbow 3a H I 5 Wrist 4 5 MUSCLE G I R T H S Hips 2 3 1 4- 2 1 5 Thi^h 3 ^Z 1 Calf 32 1 3 t- BicepsForearm 3 a 1 5 S T REMGTH TESTS Lungs 1 ^5— he As 12 2 * Back. 1 Forearm IS 2^3 23 t 5 STRENGTH OF LEGS Per Cent 5 50 95 Age 11 83 125 185 Age 15 153 213 314 Yale 136 166 247 Harvard 117 176 274 Amherst \IZ 1G9 238 The Annals of Hygiene—739 Upon examining the bone lengths, we learn that in sittingheight—that is, in the length of the vertebral column—there is aretarded state of growth relative to height during the entire periodfrom II to 15. In height of knee, on the contrary, the growth isrelatively accelerated throughout this period. There is a gradu-ally quickened growth, relative to height, on the part of thevertebral column, while the acc

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