Name of round piece of glassware with thin neck?
We used to have glassware like that in our lab.  It is basically an "unfinished" piece of glassware. In a nutshell, it was used to handle (collect, transport) gases.

It was easy and inexpensive for the glassblower to make several of those bulbs at a time; he'd make a variety of sizes.  We'd keep them in a drawer and then before we used them we'd do some glassblowing ourselves and add the expensive part - a stopcock with a ground glass joint.  Then, having already measured the volume, we could attach one to a vacuum line (no vacuum) with the stopcock open and feed a gas into the vacuum line, close the stopcock and remove the bulb.  Knowing the pressure, temperature and volume, we knew how many moles of gas were in the bulb.  We could then attach the bulb to a reaction flask and open the stopcock, so that a known amount of gas was used in a reaction.

Here is a simple picture, imagine the tube on the bottom is the vac line.



These bulbs were also used to trap gaseous reaction products by attaching the bulb with its stopcock and joint to a vac line along with a reaction flask.  The bulb was cooled to the desired temperature and when the reaction produced gases, they could be collected in the cooled bulb.