Six proper,—αι, αυ, ει, ευ, οι, ου; and

Six improper,—ᾳ, ῃ, ῳ, ηυ, υι, ωυ. The point under the first three

letters denotes the iota, and is therefore called the _subscript iota_.

The American Printer: A Manual of Typography Containing practical directions for managing all departments of a printing office, as well as complete instructions for apprentices; with several useful tables, numerous schemes for imposing forms in every variety, hints to authors, etc. · 第 121 / 417 题