The term anthropometric data may be applied to the numerical results of all observations on the structure or functions of man, i. e., such observations as: weight, height, and bone lengths in general; girth of head, body or limbs at the different levels; lateral or dorso-ventral diameters of trunk at different levels; facial measurements, including facial angles; cranial measurements; pelvic measurements; strength tests; acuteness of vision, of hearing, of feeling, and of taste; time of sense-reaction; pulse rate; blood pressure; respiratory rate; expansion of chest; lung capacity, and amount of tidal air; number of corpuscles per unit volume of blood; percentage of hemoglobin of blood, etc. These are the more important groups of anthropometric data.
A glance at the wide field covered by such data makes it evident that a very large proportion of the research work done by medical men involves the recording of numerical data. There may be