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Index
THE
SCIENCE
OF
FINGERPRINTS
Classification and Uses
UNITED STATES DEPARTMENT OF JUSTICE
FEDERAL BUREAU OF INVESTIGATION
John Edgar Hoover, Director
INTRODUCTION
CONTENTS
CHAPTER I
The Identification Division of the FBI
CHAPTER II
Types of Patterns and Their Interpretation
Types of patterns
Interpretation
The loop
Essentials of a loop
Ridge counting
Radial and ulnar loops
The plain arch
The tented arch
The whorl
The plain whorl
Central pocket loop
Double loop
Accidental
Whorl tracing
CHAPTER III
Questionable Patterns
CHAPTER IV
The Classification Formula and Extensions
The classification formula
Extensions
CHAPTER V
Classification of Scarred Patterns—Amputations—Missing at Birth
Classification of scarred patterns
Classification of amputations and fingers missing at birth
Classification of bandaged or imprinted fingers
CHAPTER VI
Filing Sequence
CHAPTER VII
Searching and Referencing
Searching
Referencing
CHAPTER VIII
How To Take Inked Fingerprints
CHAPTER IX
Problems in the Taking of Inked Fingerprints
Mechanical operation
Illegible inked prints
Temporary disabilities
Permanent disabilities
Deformities
General
CHAPTER X
Problems and Practices in Fingerprinting the Dead
Advanced decomposition
Desiccation and charring
Water-soaked fingers
Drying the fingers
X-ray photography
General photography
Deceased infants
Technical consideration
FBI aid
CHAPTER XI
Establishment of a Local Fingerprint Identification Bureau
Fingerprinting equipment
Fingerprint files
Name files
Jacket folder file
Dispositions
Death notices
Record of additional arrest
Wanted notices
Photographs
Latent fingerprints
CHAPTER XII
Latent Impressions
CHAPTER XIII
Powdering and Lifting Latent Impressions
CHAPTER XIV
Chemical Development of Latent Impressions
CHAPTER XV
The Use of the Fingerprint Camera
CHAPTER XVI
Preparation of Fingerprint Charts for Court Testimony
CHAPTER XVII
Unidentified Latent Fingerprint File
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