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CHAPTER II.

OF THOSE THINGS ON WHICH ARCHITECTUREDEPENDS.

Architecture depends on fitness (ordinatio) and ar-rangement (dispositio), the former being called in

Greek, and the latter hufatrig ; it also depends on propor-tion, uniformity, consistency, and economy, which theGreeks call ahcovopta. Fitness is the adjustment of sizeof the several parts to their several uses, and requiresdue regard to the general proportions of the fabric: itarises out of dimension (quantitas), which the Greeks calltfoo-orqg. Dimension regulates the general scale of thework, so that the parts may all tell and be effective.Arrangement is the disposition in their just and properplaces of all the parts of the building, and the pleasingeffect of the same; keeping in view its appropriate cha-racter. It is divisible into three heads, which, consideredtogether, constitute design: these, by the Greeks, arenamed idtou : they are called ichnography, orthography,and scenography. The first is the representation on aplane of the ground-plan of the work, drawn by rule andcompasses. The second is the elevation of the front,slightly shadowed, and shewing the forms of the intendedbuilding. The last exhibits the front and a receding sideproperly shadowed, the lines being drawn to their propervanishing points. These three are the result of thoughtand invention. Thought is an effort of the mind, everincited by the pleasure attendant on success in compass-ing an object. Invention is the effect of this effort ; which