

CONTENTS. 



CHAPTER I. 



ON METHODS OF MEASURING ORGANISMS. 



PAGE 



Preliminary Definitions 1 



Methods of Collecting Individuals for Measurement 2 



Processes Preliminary to Measuring Characters 2 



The Dermination of Integral Variates Methods of Counting 3 



The Determination of Graduated Variates Method of Measurement.. 4 



Straight lines on a plane surface 4 



Distances through solid bodies or cavities 4 



Area of plane surfaces 4 



Area of a curved surface 5 



Form of a plane figure 6 



Characters occupying three dimensions of space 9 



Characters having weight , 9 



Color characters 9 



Marking- characters 10 



CHAPTER II. 



ON THE SERIATION AND PLOTTING OF DATA AND THE FREQUENCY 



POLYGON. 



Seriation 11 



Plotting 12 



Method of loaded ordinates 12 



Method of rectangles 13 



Certain constants of the Frequency Polygon 13 



The mean 13 



The mode 14 



The median magnitude 14 



The probable error of the mean 14 



The index of variability 15 



The probable error of the standard deviation . . 15 



Average deviation and probable error 15 



Coefficient of variability 15 



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