It will now be apparent that even a common object may result from such careful consideration that its form will at once suggest its use; but the object will only reveal the purpose for which it was created with definiteness of expression when it perfectly answers the end proposed by its formation. The advice which I must give to every designer is to study carefully exactly what is required, before he proceeds to form his ideas of what the object proposed to be created should be like, and then to diligently strive to arrange such a form for it as shall cause it to be perfectly suited to the want which it is intended to meet.
More will be said upon the subject of form when speaking of glass vessels and of silversmiths' work; and when considering these subjects we shall also give the law which governs the application of handles and spouts to vessels; and it is of the utmost importance that they be correctly placed in order that the vessel may be used with convenience (see page 140). A word must now be said respecting the decoration of earthen vessels, but on this subject our remarks must be brief.
The object to which the decoration is applied must determine the nature of the ornament to be employed. In the case of a vessel which is to be in part hidden when in use, great simplicity of treatment should be adopted, and the ornament may with advantage consist of repeated parts. In the case of a plate, little or no ornament should be placed in the centre; but if there is a central ornament it should be a small, regular, radiating figure, consisting of like parts (Figs. 114 and 115). The border should also consist of simple members repeated, for it will then look well if portions are covered; and these remarks will apply equally to all kinds of plates, whether intended for use at dinner or dessert.
No plate should have a landscape painted upon it, nor a figure, nor a group of flowers. Whatever has a right and wrong way upwards is inappropriate in such a position, as whatever ornament a plate bears should be in all positions as fully right way upwards to the beholder as it can be. Besides, landscapes, groups of flowers, and figures are spoiled if in part hidden, provided they are satisfactory when the whole is seen.