Description: Segment 1 The female roundworm is shown and manipulated with tweezers, as the intertitles point out the ovarian tubes. The worm's eggs are shown in magnified view, and the intertitles explain the embyonal development. The ovarian tubes are dissected out of the worm, in order that a culture of hatched ova may be made. The worm is cut with small scissors, and the tubes removed. A culture dish is prepared and the ovarian tubes are emptied into the dish. The intertitles explain how to maintain the correct conditions for the eggs to hatch. Time start: 00:00:00:00 Time end: 00:05:34:06 Length: 00:05:34:06 Segment 2 The eggs are shown greatly magnified, and the intertitles explain their development in the culture dish. Magnified shots of two different species of ascaris are shown. The embryos are shown escaping from the eggs, and the intertitles explain what would happen next if the eggs had been laid in a host, as they would be normally. Time start: 00:05:34:06 Time end: 00:10:46:07 Length: 00:05:12:01