. The bowlwas almost invariably waisted, that is, its sideswere bent inwards. The foot was folded andthere was a characteristic lessening in thediameter of the stem as it neared the bottom,which the puller of toffee will readilyunderstand. Air-twisted Stems. — The air-twist probablybegan with a… … Eighteenth-Century Glass drawn out, the bubble elongated into a tube,and when the stem was twisted, the tubeacquired a spiral shape. Now as the tubewas filled with air, which had a different re-fractive capacity to the glass which surroundedit, the effect of the light falling upon itwas to produce…
Glass
Internet Archive · University of Toronto, Robarts Library · Public Domain Mark 1.0. Free to use for anything.
![An illustration from [Catalog]. (1908)](https://img.insideoutlibrary.com/img/200/ia-catalog00macy-248-647.webp)
