dactylology

Its advocates tell us that when these results shall have been made known, and the attention of the philanthropist and man of science shall have been directed to them, the days of the old system of dactylology, or communication by the aid of fingers, will be numbered. 

Schematology is itself divided into Typology or Grammatology, and Cheirology or Dactylology.

It is certain, however, that he made no use of the sign-language, though there is some evidence that he invented and practised a system of syllabic dactylology.

To the general public, dactylology or finger spelling is the sign-language, or the basis of that language, but to the profession there is no relation between the two methods of communication.

Signs, dactylology, speech reading, and the written and printed word are all dependent upon the eye for their value as educational instruments.