986 The American Naturalist. [December, 
would be required to produce the 26,812 specimens reported 
in the collections mentioned? I have inveighed against the 
speculation by which we sometimes attempt to determine, 
what a great amount of labor the Indian would do for the 
accomplishment of so little, sometimes the reverse; but we 
may fairly assume that the aborigine was not such a con- 
summate idiot as to open a quarry as large as this at Piney 
Branch, and do as much hard work as must have been done 
there, with the paltry outcome of the insignificant number of 
quartzite implements shown in the aggregate collections form 
the District of Columbia. To complete the information on 
this branch, I have introduced the consolidated tables VI and 
VII showing the subdivisions according to material and 
locality. 
TABLE VI. RECAPITULATION ACCORDING TO MATERIAL. 
OF ded el 8,058 
es 9,674 
Porph eit site, rhyolite. 5,478 
Argillite, hale, fer. sandstone 3,541 
Chert, flint, jasper 64 
26,815 
TABLE VII. RECAPITULATION ACCORDING TO LOCALITY, 
Bennin 11,108 
_ 4,765 
Jones onic, j 
Piney B: 32 
Little Falls Church Branch 5,071 
Piode MI sanninna e ieni pi ayaa ont vovbenned tastes 32 
An pho Mig 39 
Piscataway, M 603 
Falls Serete 66 
r. McGui: 353 
Distriet of "Columbia, io pa ea locality unidentified.............-....----+ 3,341 
26,815 
1 Mr. Holmes’ ob!ects are not included. 
III. 
_ Mr. Holmes’ theory is that the sole implement sought to be 
obtained by the workman from this quarry, was the thin, leaf- 
shaped blade, the result of what he calls the third process. 
His processes Nos. 1 and 2 for making turtle-backs were 
according to his theory, only designed to lead up to process 
No. 3, which should produce the thin, leaf-shaped implement. 
