1896.] Piney Branch (D. C.) Quarry Workshop. 983 
were common to the region), which were not from the Piney 
Branch quarry because not made of quartzite. This table 
shows 21497 such specimens. Table III, showed 2,534 speci- 
mens which might have been made from leaf-shaped blades, 
TABLE IV. SUCH AS KNIVES, SCRAP ; 
ARROW AND SPEAR HEADS, ETC., APP ARENTLY NO TAADA FROM LEAF- 
S 
Porphritic | Argillite, Flint. 
Quartz. | Quartzite. Felsite, (Clay. slate, Jasper. 
Rhyolite. Iron Chert. 
Locality. 
No. of No. of No. of No. of No. of 
Implts. Implts. Implts. Implts. Implts. 
Bennings 716 260 13 350 
3000 4000 200 1500 
Red Bank 700 1200 1500 500 
o - Landing 300 500 200 100 
Anacostia 35 
Piney nag a a SRE 
Little Falls........ wesrvoresoeevsee + oise 28 12 23 26 
500 1000 2000 100 
Pierce’s Mill 82 
Piscataway 25 75 
tae Church. iy 8 6 1 
. S. Natl. Mus. Misel. Collec- 3987 12 
tions. from D. C., generally. 1720 554 19 253 29 
| 7032 7607 3955 2830 41 
Total impl : pan ta leaf-shaped blad 21,497 
RECAPITULATION. 
Table I. Leaf-shaped blades, cacked..sscssersssscrscsescarsvcesssvncassossces vovacensecesite ove vesnsoen 865 
Table IT. Leaf -shaped blades, zot cached, 1,948 
Table III. d blades, Fmpls 2,534 
Table IV. Impls. wot made from ct shaped bindes, PREE APAE O EEP LEET tenses 21,497 
26,844 
but of these, only 694 were of quartzite. The aggregate of 
these counts shows 24,031 (21,497 + 2, 534) specimens in these 
collections not made from Piney Branch quartzite leaf-shaped 
blades, against 694 which might have been. 
Plate XXV shows how arrow and spear heads are, or may 
be, made from leaf-shaped implements. The five specimens at 
the top of the Plate are such. They were at one time leaf- 
shaped implements, and by the making of the notch and 
stem, they have been changed to arrow or spear heads, 
that is to say, they have been subjected to the second 
process which has changed them “into the final forms re- 
