A few more views–Beth Shaut of the Carder Glass Shop in Corning says:

Difference between reeding and threading as told me by Mr. Rockwell, reeding is an uncontrolled reed of glass and threading is an applied thread of glass by controlled machine.

Southerner, Bonnie Salzman of Richmonds notes:

Paul Gardner’s book, p. 86, says:
“Carder used applied threads manipulated in many variations and techniques during his entire career. At Steuben, when the threads were put on close together in a regular spiral by a machine, the piece was designated as having a “threaded” decoration. When they were applied irregularly by the gaffer, the piece was said to have “reeded” decoration.

Then Michael Krumme of LA opines on the contrast of responses in #607 :
Alan, I’m with Dick Stark on this one — unless someone else comes up with a compelling verification for Mr. Dreiling’s explanation.
As a final item the Carder Steuben Club along with the Corning Museum of Glass is putting on a fabulous Symposium this coming Oct. 1-3. If at all possible it should be a “must”. Put the dates on your calendar. Just a teaser on one of the programs .
A Kaleidoscope of Inspiration – Carder On His Contemporaries

Rakow Library Public Services Staff

In 1961 Thomas S. Buechner said: “No man could better personify the kaleidoscope of glass-making during the past hundred years.” Carder’s glass work was affected by his academic and technical training, his visits to London and Paris museums and galleries, and the styles of his contemporaries. Carder’s notebooks and recorded interviews that provide insight into his inspirations and opinions will form the basis of this presentation. Of particular note is Carder’s 1898 journal recording his impressions of ancient works of art as well as his contemporaries’ new Art Nouveau style