Bench Glassblowing Torch: Brass Gas Blowpipe with a Glass Air Jet (Shenstone, 1916)

A glassblower's gas blowpipe you can make yourself: a brass tube with a side tube for gas, and a glass air jet down its middle fed from a foot-blower. A fine jet gives the small pointed flame for joints, and a wider jet the big brush flame for heating large tubes. It is pegged into a wooden block on a sheet-iron-covered bench, with taps for gas and air at the bench edge. Result: a bench blowpipe for working glass tube. Make two: one about 11 mm bore for small work, one 15 to 17 mm for large. Source: W. A. Shenstone, The Methods of Glass-Blowing (1916), pp. 3-9. Unknown: the brazing metal and the tap type. Picture: Fig. 1 of the book.