Society of Glass Technology · [Sheffield] · leaf 592
tv^. m f liffff h h ^ ml Fig. 140. Fig. 141. against a socket, w, on the end of the shaft, h. This socket carriesa recessed rubber block, x (Fig. 141), the friction of which againstthe head of the stopper is sufficient to screw the stopper home,whereupon it slips on the stopper without damaging it.…
Glass
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
