18. How may the foregoing qualities be demonstrated?
19. What shapes should be used in combination?
20. What further relationship should they have?
21. On a type page 20 picas wide by 30 picas deep would a panel 18 picas wide by 8 picas deep be proper? What, if anything, would be preferable?
22. Would a rule line 6 points wide be suitable to surround a mass of 18 point Caslon old style caps? Why?
23. If the printed page is to be other than black and white, what further consideration of harmony is involved?
24. What must we consider in related areas with respect to their size or measure?
25. What relationship of sizes is often most interesting?
26. Place a single line on a cover page in a desirable position.
27. Is the eye always to be trusted in the judgment of space relationships?