As appendages have distinct functional duties their design may vary as the design of the arm of the human figure differs from the head. Yet, as parts of the same body, they must fit the shape of the object to which they are attached. The candle holder and handle as appendages in [Figure 150] are designed in sympathetic relation by means of tangential and similar curves sufficiently varied to give the eye a feeling of variety in the design. The novel single flower holders, [Figures 151] and [152], with the glass test tube acting as a container show other possible forms of the appendage design. The first is informal while the second is formal, but both adhere to the first simple rules of appendage design. Rule 4a, etc.
Enrichment of Intermediate Points
Figure 156a.—Candlestick, Rendered by E.R.
The enrichment of center or intermediate points should be handled with great care and with a definite reason. Careless handling may cause the design to lack unity. [Figures 154] and [155] show a simple twist as enrichment. The serviceable reason for this is to obtain a grip at the point of the twist. Again, it varies the character of the straight edges and adds interest without loss of compactness or unity. If one is desirous of widening a vertical or horizontal rod, the enrichment made by welding a number of small rods together with a spreading twist gives a pleasing and serviceable handle. [Figure 156].
Plate 28
Enrichment of Terminals
Free and Dependent Contour Enrichment
As the public demands a happy ending to a story or a play, so does the eye demand a well-designed ending to a design. The part that terminal enrichment plays in industrial design is, therefore, to say the least, important to us as designers. [Figure 157] illustrates terminals in thin metal and is shown by courtesy of the School Arts Magazine from one of the articles by Mr. Augustus Rose. The outlines are in part dependent in character, controlled by rivets. Notice the change of curve as the function changes from the dependent curve of the rivet area to the free outline of the handle and again from the handle to the cutting blade; a functional change of marked character, but in thorough unity with the entire design. It is again emphasized that whether the design possesses a free or a dependent outline, or a combination of both types, all parts of the design must be held together by entire unity. The rivets are occasionally placed toward the edge and a domed boss is used to accent the center as is shown in [Figure 158].