The hillside entitled “Pathless,” by Horsley Hinton is a subject easily passed in nature as ordinary, which has been however unified and made available through the understanding of this principle. So much of an artist is its author that I can see him down on his knees cutting out the mass of blackberry stems so that the two or three required in the foreground should strike as lines across the demi-dark of the lower middle space. The line of the hill had cut this off from the foreground and these attractive lines are as cords tying it on. From the light rock in the lower centre the eye zigzags up to the line of hillside, cutting the picture from one side to the other. Fortunately nature had supplied a remedy here in the trees which divert this line. But this is insisted on in the parallelism of the distant mountains. The artist, however, has the last word. He has created a powerful diversion in the sky, bringing down strong lines of light and a sense of illumination over the hill and into the foreground. The subject, unpromising in its original lines, has thus been redeemed. This sort of work is in advance of the public, but should find its reward with the elect.
Gradation will be mentioned in another connection but as a force in balance it must be noticed here. It matters not whither the tone grades, from light to dark or the reverse, the eye will be drawn to it very powerfully because it suggests motion. Gradation is the perspective of shade; and perspective we recognize as one of the dynamic forces in art. When the vision is delivered over to a space which contains no detail and nought but gradation, the original impulse of the line is continued.
[Hillside (Graded Light Upon Surfaces; Cloud Shadows); River Fog (Light Graded by Atmospheric Density); The Chant (Gradation through Values of Separated Objects)]
Gradation, as an agent of light, exhibits its loveliest effect and becomes one of the most interesting and useful elements of picture construction.
As a force in balance it may frequently replace detail when added items are unnecessary. In “Her Last Moorings” the heavy timbers, black and positive in the right foreground, attract the eye and divide the interest. The diversion from the hulk to the sky is easy and direct and forms the natural axis. A substitution for the foreground item is a simple gradation, balancing a like gradation in the sky.