536 Aboriginal Stone-Drilling. [July, 
25. The structure of the Eye of Trilobites. Am. Nat., xIv, pp. 503-508 
(1 
SMITH, SIDNEY IRVING— 
26. Occurrence of Chelura terebrans, a crustacean destructive to the timber of 
submarine structures on the coast of the United States. Proc. U. S. Nat. 
Mus., Il, pp. 232-235 (1880). 
27. Onsome points in the structure of a species of the “ Willemcesia group of 
Crustacea.”? Ann. and Mag., V, Vv, p. 269 (1880). 
. Crustacea of Mexico and Central America. Am, Jour. Sci., III, XIX, pp. 
332, 333 (1880). 
[Notice of A. Milne-Edwards’ Etudes sur les Xiphosures et les Crus- 
taces de la region Mexicaine. 
. [Review of Kingsley] On a collection of Crustacea from Virginia, North 
Carolina and Florida, with a revision of the genera of Crangonidz and 
Palemonidee [supra 5]. Ann. Jour. Sci., HII, xix, pp. 423-424 (1880). 
. [Notice of Huxley’s] The Crayfish; an introduction to the study of Zool- 
ogy. Am. Journ., III, xix, p. 424 (1 
31. Notes on Crustacea collected by Dr. G. M. Dawson at Vancouver and the 
Queen Charlotte islands. Report of progress of the Geol. Survey of 
Canada, 1878-79, pp. 206 B-218 B (1880). 
. On the species of Pinnixa inhabiting the New England coast, with remarks 
on their early stages. rans. Conn, Acad., Iv, pp. 247-253 (1880). 
33. Occasional occurrence of tropical and subtropical species of Decapod Crus- 
tacea on the coast of New England. Trans. Conn. Acad., IV, pp- 254-257 
to 
ios) 
iS) 
oO 
iss) 
° 
w 
nN 
(1880). : 
. On the Amphipodous genera, Cerapus, Unicola and Lepidactylis, described 
by Thomas Say. Trans. Conn. Acad., Iv, pp. 268-284, pl. 11a (1880). 
Bs 
:03 
ABORIGINAL STONE-DRILLING. 
BY CHARLES RAU. 
iL twelve years ago, I published an account of my exper 
ments in drilling in stone without the aid of metallic tools,’ 
and, though during the interval my attention was constantly fixed 
upon archeological matters, I had, on the whole, no occasion for 
changing the opinions then expressed. 
In the meantime, however, similar experiments, made by Euro- 
pean archeologists, were commented on by Mr. John Evans, who, 
after a due consideration of the subject of stone-drilling, gives the 
following summary of methods: 
“On the whole, we may conclude that the holes were bored in 
various manners, of which the principal were— 
1. By chiseling, or picking with a sharp stone. ; 
2. By grinding with a solid grinder, probably of wood. 
1 Drilling in Stone without Metal; Smithsonian Report for 1868, p- 392-40 
