Worthen, William Ezra, 1819-1897, [from old catalog] ed · New York, Appleton · leaf 692
Fig. 1659. … Fig. 1658. Fig. 1660. Examples of window tracery, showing its constructive centres and lines, aregiven on pages 81 and 82, illustrating the chief varieties. The following figuresare more complete in positionand with architraves, Geomet-
Mechanical drawing
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