TABLES NO. 38 TO 51. 
The tables which follow this page repeat some of the 
more commonly used statistical values in a form which admits 
of ready reference and comparison. Such are the average, 
probable error of the average, probable deviation, median or 
50 percentile grade and median minus average values. Yet 
these tables are by no means summaries of the statistical calcu- 
lations of the investigation, since they omit much that is given 
in the foregoing pages. They contain, moreover, not a little 
new matter. The relation of probable deviation to average, 
relation of average to height standing, relative annual 
increase of average, the 25 percentile grade, the 75 percentile 
grade, the cranial indices and the absolute annual increase of 
average of strength of squeeze and of measurements of the 
head and face are here presented for the first time. 
Some of this material has been already discussed in this 
paper. Some is reserved for future discussion. One series, 
the relation of probable deviation to average, was treated at 
some length in my paper on ‘The relation between the 
growth of children and their deviation from the physical type 
of their sex and age,’’ Transactions of the Academy of Science 
of St. Louis, Vol. VI, No. 10, pp. 233-250, November 14, 
1893, to which the reader is referred. 
Five dynamometers were used in testing the strength of 
squeeze ; they were distinguished by the first five letters of 
the alphabet; A and D were graduated alike ; C and E were 
also alike but differed from A and D, and B differed from all 
the others. The original values obtained with these various 
instruments are set down in Tables No. 45 and 46; from them 
were made Tables No. 43 and 44, by reducing the arbitrary 
graduation of all dynamometers to a uniform scale in kilo- 
grammes. 
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