A short explanation of Jack-in-the-Pulpit Glass:
The name "Jack-in-the-Pulpit" glass refers to a shape of vase, which has a collar pulled down in the front and raised at the back. It is a similar shape to the flower of the same name.
Jack-in-the-Pulpit was the name first used by Louis C. Tiffany to describe some of his beautiful vases around 1900, but a very similar shape of vase was made in England as far back as the 1850's by companies such as Stevens and Williams. Several English and European companies made this shape of vase in the late 19th century and later, but often identified it by a number rather than a name.
Jack in the Pulpit is the most common name, but many companies used different ones. The vase on the left is a modern (1990's) piece by the Fenton Art Glass Company, who have made many beautiful shapes and colours of Jack-in-the-Pulpit vases. Fenton always call them "Tulip" vases, not "Jack-in-the-Pulpit".
Here are some books on glass which include some Jack-in-the-Pulpit vases, that you may find helpful. Click on any book cover or title to read more about a particular book.
