As regards the length of line and choice of types, the following should be observed ;
1.-The most important word (catch-words) should be made prominent by larger type or spacing.

2.-The oftener a short conjunction or article (for, the, and, or, &c.) is placed between the lines, the more effective will the title be; such words must be set in smaller type.

3.-Two lines of equal length should not come together; long and short alternating as much as possible.
4.-The author's name is set in type a little smaller than the principal catch word.

5.-The lettering is most effective when the type is selected and arranged so that it rises in size towards the middle line and then decreases.
6.-Unnecessary length tends to indistinctness; the best title tells what the book is in very few words, and should be easily read at a little distance.

It is impossible to mark out the whole of the title with the dividers unless a specimen copy is at hand from which the spaces can be measured. The best guide is the eye. The distance between the lines should be equal; a plain line is reckoned as a line of type and must not be placed at half the distance between the lines.

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