上帝充通大粤 SHANGHAI JIAO TONG UNIVERSITY Pasteur and the Downfoall of Spontaneous Generation 3rd experiment Method Broth in flask with swan neck,fresh air could get inside but not particles from the air ·Heating the broth. Results Heated broth in the open flask did not spoil Contact with particles stopped in the neck led to quick spoilage Conclusion Spontaneous does not occur,cells can only come from cells Criticism: No criticism 22 上海交通大学《微生物的世界》22 上海交通大学《微生物的世界》 Downfall of Spontaneous generation (3) Method • Broth in flask with swan neck, fresh air could get inside but not particles from the air • Heating the broth. Results • Heated broth in the open flask did not spoil • Contact with particles stopped in the neck led to quick spoilage Conclusion • Spontaneous does not occur, cells can only come from cells Pasteur and the Downfoall of Spontaneous Generation 3 rd experiment Criticism: No criticism