OF THE ARROW-HEADED CHARACTER. 507 
nelian, agate, and other similar materials, as we 
find in the case of those singularly beautiful Baby- 
lonian cylinders, by the rolling of whose engraved 
surfaces over clay or wax, impressions such as 
used on seals, were produced, in a most perfect 
manner, as indicated in Fig. 11. 
BABYLONIAN CYLINDRICAL SEAL ROLLER. 
FIG. ll. 
wa ERAT 
EAE 
SS LT 
ee SS SSS@0.05 SEES 
— <=. Sh 0 a Ne 
The mechanical principles inherent in this 
beautifully simple form of seal roller, indicate a 
very high order of ingenuity, well worthy of the 
originators of the arrow-head, inasmuch as by 
engraving the inscription or device on the surface 
of a cylinder, they were enabled in a very small 
compass to include a very considerable surface of 
seal; and, above all, as such a cylinder would, in 
being rolled over the surface of the clay or wax, 
