上游充通大￥ HANGHAI JIAO TONG UNIVERSIT Pasteur and the Downfall of Spontaneous Generation 1st experiment Methods Collection of microbes from the air Guncotton filters to stop particles Guncotton filters dissolved in alcohol and ether Examined particles under microscope Results Microbial cells found in the air and those in spoiled food were not distinguishable Conclusion Organisms found in spoiled materials came from microorganisms in the air Criticism: Can not exclude the possibility of spontaneous generation 19 上海交通大学 《微生物的世界》19 上海交通大学《微生物的世界》 Downfall of Spontaneous generation (1) Methods • Collection of microbes from the air • Guncotton filters to stop particles • Guncotton filters dissolved in alcohol and ether • Examined particles under microscope Results • Microbial cells found in the air and those in spoiled food were not distinguishable Conclusion • Organisms found in spoiled materials came from microorganisms in the air Pasteur and the Downfall of Spontaneous Generation 1 st experiment Criticism: Can not exclude the possibility of spontaneous generation