10 ILLUSTRATIONS [kih. a.nn.15 



rage 

 Plate XXXV. Quartzite Madesof varying size and outline, mainly unspeeial- 



izi-d, friiin I'litoiiiuc village-sites (} actual size) 60 



XXXVI. Specialized ([uartzite l)lades, j)r()bably in the main projectile 



points, from Potomac villagc-siti's (3 actual size) 60 



XXX\'II. Specialized (iiiaitzite Idadcs, proliably in the main arrowpoints, 



from Potomac village-sites ( J actual size) 60 



X X X \' II I. Series of forms illustrating progressive steps in the manufacture 



of arrowpoints from <in,artz pebliles 63 



XXXIX. Quartz blades showing slight traces of specialization (i actual 



size) 64 



XL. Specialized quartz blades, probably in the main arrowpoints 



(J actual size) 64 



XLI. Specialized quartz blades, probably in the main arrowpoints 



(I actual size) 64 



XLII. Quartz arrowpoints of eccentric shapes (| actual size) 64 



XT-III. Selected forms illustrating progressive steps in shaping rhyo- 



lite implements 67 



XLIV. Uuspecialized rhyolite blades, mainly from Anacostia village- 

 sites (f actual size) 68 



XLV. Specialized rhyolite blades, probably largely knives and spcar- 



poiuts, mainly from Anacostia village-sites (f actual size). .. 68 

 XLVI. Si)ecialized rhyolite blades, probably largely projectile points, 



mainlj' from Potomac village-sites (} actual size) 70 



XLVII. Rhyolite arrowpoints, mainly from Potomac village-sites (| ac- 

 tual size) 70 



XLVIII. Selected forms illustrating progressive steps in the shaping of 



leaf- blade implements from argillite 72 



XLIX. Sharpened bowlders from Potomac village-sites (i actual size). 74 

 L. Sharpened and battered bowlders from Potomac shell heaps 



(A actual size) 76 



LI. Rude axes made by sharpening and notching quartzite bowl- 

 ders by flaking, from Potomac village-sites (J actual size) .. 78 

 LII. Rude ax-like implements from Potomac village-sites (| actual 



size) 80 



LIII. Rude axes or picks made of ([uartzite bowlders sharpened and 

 notched by flaking, from Potomac village-sites (a | actual size; 



/) actual size) 83 



LIV. Slightly modified quartzite bowlders used as implements (i ac- 

 tual size) 84 



LV. Series of specimens illustratingprogressive stages in the shaping 

 of celts by fracturing, battering and abrading (about | actual 



size 86 



LVI. Group of celt-axes from the tidewater region 89 



LVII. Seriesof specimens illustrating progressive stages in the shaping 



of the grooved ax 90 



LVIII. Outlines of grooved axes illustrating range of form 92 



LIX. (iroup of grooved axes from Potomac-Chesapeake village-sites 



(about i actual size) 94 



LX. Flaked specimens illustrating the rejectage of celt making 96 



LXI. Flaked specimens illustrating the rejectage of celt making 96 



LXII. Specimens illustrating advanced step in celt making 98 



LXIII. Specimens illustrating advanced step in celt making 98 



LXIV. Specimens illustrating breakage in celt making 100 



LXV. Specimen illustrating ronghcd-outcelt, very thick at the lower 



end 100 



