Experimental glass blowing for boys

by Carleton John Lynde

Experiment 50. To make a third syringe.

Heat a piece of No. 6 tube in the blowpipe flame at a length of 7½ inches, draw it out, and close the end, then smooth the other end.

Now to make a plunger: Heat a piece of No. 2 tube 8½ inches from one end in the lamp flame, draw it out into a nozzle, and break it off, leaving a small hole at the end of the nozzle. Smooth the other end in the lamp flame, flare it out slightly, allow it to cool, dip it into water and insert it into a small wet coupling.

FIG. 70
A THIRD SYRINGE

Now fill the large tube with water and insert the coupling plunger (Fig. 70). Do you get a fine long stream?