If formed of cement, they must have time to harden, and for that purpose must be removed from the mould on which they were formed, to prevent cracking by contraction; and here the cloth bandage becomes a necessity. But this cloth is a costly article, requiring a great expenditure of hand-labor and time. It must not be allowed to fasten

to the vessel as the cement hardens. To prevent this, a simple, natural device has been adopted. The pottery shows a laminated texture. No doubt every fresh layer of the cement has been hardly compressed on the previous one; for at hand we find the primitive tools that were used for the purpose, scattered over the site of this ancient pottery-