145. Distinguish two subject-headings which are spelled alike by italicized phrases in parentheses.
Ex.
Calculus (in mathematics).
Calculus (in medicine).
146. Medium avoids the repetition of the heading with all titles after the first by using a dash. Short usually employs indention.
Indention takes as much room as the dash and is much less clear. There should always be at least a hair-space between the end of the dash and the next letter; indeed that is the rule of all good printing. Under a subject the repetition of the {67} author’s name is indicated by a second dash. [48] (The repetition of the title is shown by the word Same.)
Cobbett, Wm. Emigrant’s guide.
— A little plain English. London, 1795. 8º.
— Same. Phila., 1795. 8º.
— Porcupine’s works.