1. Glassware are usually connected by tightly fitting and greased ground glass joints . 2. Glassware are usually connected via tightly-fitting and greased ground glass joints . 3. The ends of the necks are usually conical ( female ) ground glass joints . 4. In the past, scientists constructed their own laboratory apparatus prior to the ubiquity of interchangeable ground glass joints . 5. Round bends of glass tubing with ground glass joints may be used to adjust the orientation of various vessels. 6. Ground glass joint ( or ground glass stoppers ) are commonly used with laboratory glassware, mainly because of their nonreactivity.7. The apparatus consists of an electric heater with a digital thermostat and two or more bulbs connected with ground glass joints . 8. Sodium hydroxide is also mildly corrosive to glass, which can cause damage to glazing or cause ground glass joints to bind. 9. Round-bottom flasks often have one or more conically tapered ground glass joint openings, or " necks ". 10. Glass stoppers typically have a matching tapered inner ( or male ) ground glass joint surface, but often only of stopper quality.
