ILLUSTRATIONS TO VOLUME III A 



Frontispiece. Francis Galton, aged G6, from the copperplate prepared for Biometrika, 

 Vol. ii. 



Extra Plate. The Greek Girl of the "Just Perceptible Difference" Lecture of 1893, 

 to face Table of Contents. 



Tailpiece. Sir William J. Herschel's Forefinger prints at an interval of 54 years, 



the longest known evidence for persistence, to face Appendix n, p. 438 



plate to 



I. The Genometer, after a suggestion of Francis Galton . 



II. Galton's " Ogive Curve " as exhibited by a marshalled series of 



Bean Pods ........... 



Dr Sorby's painting of a tree from the black pigment of human hair 



Dr Sorby's painting of a tree from the red pigment of human hair 



Rajyadhar Konai's Contract with Sir W. J. Herschel, made at Hooghly, 



1858, and signed with the imprint of his right hand 



Effects of various injuries on Finger-Print Patterns 



Persistence of minutiae in Finger-Print Patterns at intervals of nine 



and twenty-eight years ......... 



Persistence of minutiae in Finger-Print Patterns at intervals of twenty 

 six, thirty and thirty-one years ....... 



The Standard Patterns of Purkenje, with Galton's drawings of their 

 Cores ............ 



TIL 

 IV. 

 V. 



VI. 

 VII. 



VIII. 



IX. 



X. 



XI. 

 XII. 

 XIII. 

 XIV. 



XV. 

 XVI. 

 XVII. 



XVIII. 

 XIX. 



XX. 



XXI. 

 XXII. 

 XXIII. 

 XXIV. 



XXV. 

 XXVI. 



XXVII. 



XXVIII. 



XXIX. 



XXX. 

 XXXI. 



Examples of the "outlining " of Patterns to assist Classification . 

 Outlines of Patterns in Arches and Loops ..... 



Outlines of Patterns in Whorls, and Cores to Loops and Whorls . 

 Outlines of the ten Digits of eight Persons, taken at random 

 Transitional Patterns — Arches and Loops ..... 



Transitional Patterns — Loops and Whorls ..... 



Persistence of Finger-Prints, Enlarged Patterns .... 



Persistence of Finger-Print Patterns with corresponding minutiae like 

 numbered ........... 



Finger-Prints of Like Twins, from the Collection in the Galtoniana 

 Blurred Finger-Prints, Illustrations of Galton's Treatment (enlarged 

 2£ times) ........... 



Selected corresponding Portions of Blurred Doublets (enlarged 7 times) 

 Skeleton Charts of Ridge Central Lines of Doublets of Plate XX 



Plate XXI overprinted on Plate XX 



Classification of Finger-Prints, Types treated by Galton as Arches 

 Classification of Finger-Prints, Types treated by Galton as Loops . 

 Classification of Finger-Prints, Types treated by Galton as Whorls 

 Galton's method of counting Ridges in Loops. Illustration of dabbed 

 and rolled prints .......... 



Illustrations of Galton's Secondary Classificatory Symbols (i,f, c) 

 Illustrations of Galton's Secondary Classificatory Symbols (y, v, vy) 

 Galton's Secondary Classificatory Symbols applied to Noteworthy 

 Peculiarities .......... 



Illustration of the use of Galton's Secondary Classificatory Symbols 

 Francis Galton, the Founder of the Science of Eugenics, from a photo- 

 graph of 1902, by the late Mr Dew-Smith. (By kind permission of 

 Mrs Dew-Smith) 



face page 

 30 



31 



97 

 97 



146 

 154 



166 



166 



179 

 180 

 181 

 181 

 181 

 181 

 181 

 182 



182 

 191 



197 

 197 

 197 

 197 

 213 

 213 

 213 



213 

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213 

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217 



