Show tho pyra mias D daring aring a resi residence id en of two winters in ill a tomb tit ra gizea mr W at flinders patric collected el I evidence showing flint tho ibo atooli bied u cd in ili working stone years ago were yere constructed ted tel with a jewel ewel na as tile cutt cutting ing edge iio ile st stated t a hie reason f for r coming to this conclusion in a paper read before Anthropological the payer institute a sti tute a res resume sunie of which ji ia published in t recent i issue buc 0 fl gincer ing a of london solid and tubular drills straight i and circular disk saws and lathe tools were made with jewels set in ill metal the lines of cutting on oil a granite core eore made mado by a tubular drill form a continuous spiral the groove grooves being of a uniform depth and width throughout showing that the tile c cutting point was not worn as the work york a advanced the regu lar taper of lie the core would indicate that jewels were also set upon the outside and inside of the drill thereby facilitating its removal in some specimens of granite the drills sank one tenth of an inch at each revolution and tho the pressure necessary to do this must have haie been from one to two tons the skill of the ivor workmen kmen and the capacity of the tools arc are illustrated by the ilie clean path through both soft and hard material no dimenco di renco in the groove being perceptible although it pases fr from n a soft substance into quartz subjecting the tile tools to an enormous strain in ili plane surfaces the tile depth and width odthe of the cuts indicate the successive stroke ofa saw tho the circular saw is rines proved roved by tho the regularly curved linea the forms of the tile tools were the same that experience has sanctioned at the present time the scarcity ot of the diamond and the lack of strength in ili the sapphire bapp u hire and berl bery I 1 lead to the consideration nothing has been found about the metal of which the tool was made or the method of setting the jewel |