Finials (Newel Posts). 
Left: There are six alternating panels of diamond point and unequal size bulls-eyes. The blown hollow blank is 6” tall x 4” diameter. Weight: 1 pound, 7 ounces. 
Center: This newel post finial could be either American or English and has a faceted knob on top of a dome. The hollow blown blank is 10” tall and weighs 2 ounces. 
Right: This balloon shaped blown finial is 3¾” diameter above a 1½” diameter wafer and weighs 2 pounds, 2 ounces. There are 12 slightly concave flutes cut around the post.
 
 From:  "Cooking with Class, Dining with Glass"  by the Lone Star Chapter of the American Cut Glass Association, Fig. 184.