Machines for producing lamp bulbs or valve bulbs are designed for working either molten glass or glass tubing. Of the first category the author discusses the ribbon machine, the vacuum-and-blowing machine and a machine, developed at Eindhoven, which operates without glass loss. The latter is a continuously rotating machine equipped with 16 blowing units. Each unit is capable of turning out a different model, subject only to the limitation that the amount of glass used for each is the same. The production capacity is about 4000 an hour. Since very small gobs cool too quickly to be worked with such machines, small bulbs are made from glass tubing. In this category an 18-head machine is discussed, also developed at Eindhoven, which handles short lengths of tubing. Some variants are then described, including machines that work long lengths of tubing and machines using a bottom mould instead of a blow-mould. Their production capacity ranges from 1000 to 1600 bulbs an hour. Mention is made of the production of narrow-necked bulbs from glass tubing by a process of stretching and rolling. The last section is devoted to the economic and other factors governing the choice of machine.