CHAPTER IX

METHODS OF INDEXING 131

Use of an index 131

Method of few conspicuous differences in many fingers 131

Specimen index 133

Order in which the digits are noted 134

Examples of indexing 135

Effect of regarding slopes 135

Number of index-heads required for 100 sets in each of twelve different methods 136-138

_i_ and _o_ in forefingers only 138

List of commonest index-headings 140

Number of headings to 100 sets, according to the digits that are noted 142

Transitional cases; sub-classifications 143-144

Symbols for patterns 144

Storing cards 145

Number of entries under each head when only the first three fingers are noted 146