Printing.
For where these are boldly and carefully designed, and each letter is thoroughly individual in form, the words may be set much closer together, without loss of clearness. No definite rules, however, except the avoidance of "rivers" and excess of white, can be given for the spacing, which requires the constant exercise of judgment and taste on the part of the printer.
The position of the page on the paper should be considered if the book is to have a satisfactory look. Here once more the almost invariable modern practice is in opposition to a natural sense of proportion. From the time when books first took their present shape till the end of the sixteenth century, or indeed later, the page so lay on the paper that there was more space allowed to the bottom and fore
