Printing as from engraved plates--Prof. Ray Lankester; Dr. L. Robinson 45 Methods of Dr. Forgeot 46 Smoke prints--mica; adhesive paper, by licking with tongue 47-48 Plumbago; whitening 49 Casts--sealing-wax; dentist's wax; gutta-percha; undried varnish; collodion 49-51 Photographs 51 Prints on glass and mica for lantern 51 Enlargements--photographic, by camera lucida, pantagraph 52-53 CHAPTER IV THE RIDGES AND THEIR USES 54 General character of the ridges 54 Systems on the palm--principal ones; small interpolated systems 54-55 Cheiromantic creases--their directions; do not strictly correspond with those of ridges 56-57 Ridges on the soles of the feet 57 Pores 57 Development:--embryology; subsequent growth; disintegration by age, by injuries 58-59 Evolution 60 Apparent use as regards pressure--theoretic; experiment with compass points 60-61 Apparent use as regards rubbing--thrill thereby occasioned 62-63 CHAPTER V PATTERNS: THEIR OUTLINES AND CORES 64 My earlier failures in classifying prints; their causes 64-66 The triangular plots 67 Outlines of patterns--eight sets of ten digits given as examples 69-70 Supplies of ridges to pattern 71 Letters that read alike when reversed 71 Magnifying glasses, spectacles, etc. 72 Rolled impressions, their importance 73 Standard patterns, cores, and their nomenclature 74-77 Direction of twist, nomenclature 78 Arches, loops, whorls 78 Transitional cases 79 The nine genera 80 Measurements--by ridge-intervals; by aid of bearings like compass 82-84 Purkenje--his _Commentatio_ and a translation of it in part 84-88 CHAPTER VI