A difficulty that blocks the path of every dramatist in proportion as its removal improves his piece, is that of graduating his earlier curtains so that the climax (third act or fourth, as it may) is obviously the outstanding, over-powering effect of the whole play. The curtain of the first act will do well to possess at least some slight heightening of the interest maintained progressively from the opening of the drama; an added crispness perceptible to all who look and listen. And the crisis of the second act must be differentiated from that of the first in that it has a tenser emotional value, while yet it is distinctly below that of the climax, if the obligatory scene is to come later. Sad indeed the result if any curtain effect in appeal and power usurp the royal place of the climactic scene! And this skillful gradation of effects upon a rising scale of interest, while always aimed at, is by no means always secured. This may happen because the dramatist, with much good material in his hands, has believed he could use it prodigally, and been led to overlook the principle of relative values in his art. A third act climax may secure a tremendous sensation by the device of keeping the earlier effects leading up to it comparatively low-keyed and quiet. The tempest may be, in the abstract, only one in a teapot; but a tempest in effect it is, all the same. Ibsen's plays often illustrate and justify this statement, as do the plays of the younger British school, Barker, Baker, McDonald, Houghton, Hankin. And the reverse is equally true: a really fine climax may be made pale and ineffective by too much of sensational material introduced earlier in the play.