3. Uniformity in appearance shows excellence in printing. To have one line thin-spaced and the next wide-spaced is in bad taste. Even in narrow measure this inequality can be avoided with proper care.
4. In fonts of type where ends of hyphens and dashes touch the adjoining letters, hair-spaces should be used. Also use hair-spaces before colons, semicolons, interrogation-points, exclamation-marks, and inside quotation-marks.
5. No space should be left between superior letters, or letters indicating powers, and inferior figures or letters; or between letters forming products.
6. No space should be left between the abbreviations A.D. and B.C., A.M. and P.M., between titles, such as LL.D., Ph.D., etc., or between the abbreviations of States, such {60} as N.Y., R.I., N.H., etc., except in a wide-spaced line.
7. Scripture references should be spaced as follows: II Sam. 1 : 2–6; 2 : 8–12.
8. No space should be left between the symbols $ and £ and the succeeding figures.
9. An indention of one or more ems should be allowed at the end of the last line of a paragraph.
10. The same space should be left on each side of short words, such as a, an, etc.
11. It is poor typography to thin-space or wide-space a line in order to avoid a turn-over.