Chap. XXXI.

PRINCIPLES OF PROPORTION.

1619

are 15 feet, or within a fewinches of the width of thenave; consequently the wallsand piers in this beautifulexample are 17 feet 8 inches,or 15 inches more in extentthan they would have beenif the proportion of one-thirdhad been adopted. Theheight from the pavementto the under side of vault is41 feet 10 inches.

After the examples de-scribed, we cannot doubt ofthe great proficiency that hadbeen made in the applicationof the rules of geometry toarchitecture; every feature,whether the simple mouldingor the most elaborate tracery,was set out either upon theequilateral triangle, square,or pentagon, and these regu-lar figures seem to have beenchosen on account of thefacility by which they aresubdivided. From the in-troduction of the style eachfifty years that succeededbrought with them new andimproved principles, and atthe very commencement ofthe fourteenth century, wesee the clustered pillar and

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Fig. 3028. ROSLVN CHAPEL.

Fig. 3029.

Fig. 3030.

RECTlOff OF 7JOST.VN CHAPEL.

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