1) In a 250-cc. three-necked, round-bottomed flask provided with a mechanical stirrer is placed 21.2g. (0.2 mole) of benzaldehyde , and 18.6 g. (0.2 mole) of aniline is added with rapid stirring.

2) A round-bottomed flask is used for a lot of reactions.

3) Usually it is put on a round-bottomed flask or several neck flasks.

4) She fills a round-bottomed, black clay coffeepot (known as a jebena) with water and places it over hot coals.

5) Large containers like round-bottomed flasks are placed on rings made of cork, a special soft lightweight wood with good insulating qualities to protect fragile instruments.

6) The resulting standing wave is a swirling motions such as might result if we swirled water in a round-bottomed cup.