In small types the inequalities in white space beside or between combinations like L Y A T W and letters with regular shape like H I M N, may not be readily noticed, but in large sizes of capitals these differences are greatly increased and will often make unequal white spaces in a line with uniform metal spaces.

In some styles of types a line may need unequal metal spaces in order to space the words evenly.
(Marks indicate insertion of spaces.) [Illustration: TEN MAIL TRAINS] This line has en-quads between the words, but the forms of L and T make the white space greater than between the first and second words.
[Illustration: TEN MAI'L TRAI'N'S] This line has an en-quad in first space and three-to-em in the second, with hair-spaces between some letters of the words.
So, also, it will often be necessary to insert pieces of paper, card, or thin leads between the letters of a word in large display, in order to make them evenly spaced, as shown in these examples: (Marks indicate insertion of spaces.) [Illustration: PLAINLY PLAI'N'LY UNEVENLY SPACED EVE'N'LY S'PA'C'E'D] This differential spacing in a line of capitals will also be required in a line having abbreviations or initials.

The following line, spaced with en-quads throughout, has unnecessarily wide spaces between the initials: [Illustration: JOHN ENDICOTT LODGE, A.O.

U.W.] Spaced with four-to-em in the last three places, it is improved: [Illustration: JOHN ENDICOTT LODGE, A.O.

U.W.] Capitals used as initials of titles and for other abbreviations, with the accompanying periods, should be thin-spaced or set close together, as shown in the second of these examples: [Illustration: GEORGE MARKHAM, D.D., PH.