. Report on the investigations at Assos, 1882, 1883, pt. I . -struction. In respect to the constructive details of the ceiling, onepeculiarity still requires attention. While — fortunately forthe proof of the identification — some of the coffered beamswere shifted by the same lever as the stones of the stylobateand entablature, and bear the rectangular notches indicativeof that method, others were attached to the derrick rope bya lewis precisely like that in use to-day. Upon the uppersurface of these latter is to be seen the narrow slot, in sec-tion of inverted wedge shape, peculiar to this fo
. Report on the investigations at Assos, 1882, 1883, pt. I . -struction. In respect to the constructive details of the ceiling, onepeculiarity still requires attention. While — fortunately forthe proof of the identification — some of the coffered beamswere shifted by the same lever as the stones of the stylobateand entablature, and bear the rectangular notches indicativeof that method, others were attached to the derrick rope bya lewis precisely like that in use to-day. Upon the uppersurface of these latter is to be seen the narrow slot, in sec-tion of inverted wedge shape, peculiar to this form of a lewis-hole is shown in the plan and top view of thevestibule beam. Figure 20. From a careful consideration ofthe sectipn of these blocks, it appears that the slots wereso disposed that the centre of gravity should fall between 25and 35 mm. inside the inclined edge : this proving the chiefiron of the lewis to have been about 6 cm. in width at itsnarrowest part. Figure 25. As far as it was possible to as- 126 ARCHAEOLOGICAL certain from the fragmentary material under examination, thecoffered beams of the pteroma and pronaos were invariably-lifted by dogs, and only the longer ones, belonging to thevestibule, by the lewis. Certain it is, at all events, thatlewis-holes never appear upon those remains of the former, and dog-holes never uponthose remains of the latterwhich could be identifiedwith certainty. Hence itmay be concluded that thederricks erected above thewide span of the vestibulediffered from those em-ployed elsewhere in the con-struction, — having wedge-shaped irons, instead ofcrampoons, for their tackle,and being, without doubt,considerably lighter in thewood. When possible, asin the case of the pteroma,the lifting apparatus which had been in use for the sub-structure was employed also for the laying of the cofferedbeams. But when a new derrick was required b} the exigen-cies of the vestibule, its form was altered to suit the
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