Rapport annuel du Bureau de l'ethnologie au secrétaire de la Smithsonian institution .. . ormer but sont faits de toute pierre siliceuse de taille pratique et de texture convenable, d'un quartzite grossier à un très fin proche-grainedgrès, selon la classe de travail à faire. Les martingson eux vont des lignes étroites, vives, incisées en raison de la forme de l'ornement de galerie marchande, aux larges rainures résultant de la rectification d'un orcelt hache en forme. XEarly tous ceux qui se trouvent dans les musées sont de petites spécialités pour le frottement; mais il y a beaucoup de grands blocs dans diverses localités, parfois plusieurs pieds squa

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Annual report of the Bureau of ethnology to the secretary of the Smithsonian Institution .. . ormer purpose are made of any siliceous stone of convenient size andsuitable texture, from a coarse quartzite to a very fine close-grainedsandstone, according to the class of work to be done. The markingson them range from the narrow, sharp, incised lines due to shaping asmall ornament, to the broad grooves resulting from grinding an ax orcelt into form. Xearly all of those in museums are small specimensused for rubbing; but there are many large blocks in various localities, sometimes several feet square, marked and scored in every directionby grinding or sharpening the large implements on them. Among the polishers may be included a number of small pebbles ofvery hard siliceous stone, generally some form of quartz, which by thehigh polish show long use. The larger ones may have been used forrubbing skins in tanning, as they can easily be grasped in the hand.Very few have changed from their primitive form to a greater degreethan would naturally result from the wear upon them. A few very. Fig. 91.—Muller, showing polished surface small ones, long ovoid in shape, usually not over 2£ or 3 inches inlength, were probably paint mailers, as they are well fitted for use insmall paint cups. Many of the discoidal stones—which will be spokenof under the proper head—may have had these functions. The highlypolished specimens are all from the southern states. There is onerubbing stone of pumice from Craighead county, Arkansas. Hammerstones. Hammers or hammerstones show every stage of work, from theordinary pebble or fragment, with its surface scarcely altered, to thehighly polished round or ovoid ball. They are usually of the hard-est available material, and seem to be of more frequent occurrence inthe northern districts than in the southern states, though found every-where. Used in their earlier stages merely as tools with which to fash-ion other implements, they were assigned to s

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