1 66 A History of Art in Ancient Egypt. The hypostyle halls are nearly always lighted upon the same principle. The chief differences are found in the sizes of the openings. At the Temple of Khons, where the space to be lighted was not nearly so large, the slabs of the claiLstra were much smaller" and the openings narrower (Fig. 157). In one of the inner halls at Karnak a different system has been used. The light penetrates through horizontal openings in the entablature, between the architrave and the cornice, divided one from another by cubes of stone (Fig. 158). In the inside the architrave was Fig, 157. — tlaustra in the Hypostyle Hall of the Temple of Khons. Compiled from the elevations in the Description, iii. 2S. bevelled on its upper edge, so as to allow the light to penetrate into the interior at a better anele than it would otherwise have done. The use of these clcucstra, full of variety though they were in the hands of a skilful architect, were not the only methods of lighting their temples to which the Egyptians had recourse. They were helped in their work, or, in the case of very small chambers, replaced, by oblique or vertical openings contrived in the roof itself These oblique holes arc found in the superior angles of the hypostyle hall at Karnak (I'ig. 159). After the roof
