glassvial
bglasbase

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View of base belonging to a cylindrical, light-aqua colored, glass container (possibly a vial).  Note the circular pontil mark located in the center of the vial.  This mark was created by the insertion of a long iron rod (i.e., a pontil) attached to the base or bottom of an object that is still too hot to hold...while the lip, rim or finish is being formed (Jones and Sullivan 1985: 45).  The rough circular pontil mark/scar is created when the rod is removed from the object.  Although the technique is still practiced on certain handmade items, the general use of a pontil in glass production in the United States ceased by ca. 1870 (Jones and Sullivan 1985: 45).