The art of spacing
Subtitle: a treatise on the proper distribution of white space in typography
By: [by] Samuel A. Bartels.
Publisher: The Inland printer
Published: 1926
Place of publication: Chicago
Language: eng
Format: Hardcover
Number of pages: 110
Subjects: Graphic design (Typography); Typesetting.
Other titles: Spacing, The art of.
Description: An extended essay on the proper use of white space in typeset material.  White space can be the margins of a page, spacing between paragraphs, spacing between lines of type (leading), spacing between words (word spacing), or spacing between letters within words (letter spacing).  The books sets forth a general principle of typesetting that the spaces between words on a page should be as close to equal as they can be made (assuming the right margin is justified).  The book also advocates the use of only one space after a period, question mark, and exclamation point.  (This is probably one of the earliest books about typography to advocate this practice.)